26-ID - User contributions [en]

PIXIS 1024XF

2014-01-14T15:33:47Z

Mvholt:

Back to [[Main Page|X-Ray Microscopy]]
[[Image:PIXIS_XF.jpg|thumb|PIXIS CCD camera]]
===General Information===
'''PIXIS-XF: 1024:''' 1024 x 1024 pixel CCD for lens-free, indirect imaging of X-rays using phosphor screens. Pixel size 13 x 13 um. Readout introduces ~1sec overhead per point to scanning probe diffraction. Dark current ~700ADU vs. single photon event ~50ADU, dark level evolves strongly into scan for first ten points when not in use prior to scan.
===Tube lens (Tomography)===
Tubelens(2x Objevtive) = -12050 
Tubelens (10x Objective) = ??? 
Tueblens(20x Objective) = ???
===Vendor Information===
[[Image:Princeton_Instruments_PIXIS_XF1024F_Rev_B1A.pdf|Alternate Text]]
[[Category:XMG]][[Category:Diffraction]][[Category:Tomography]]

Sample Alignment Quick Reference

2010-11-26T17:36:26Z

Mvholt:

Back to [[Diffraction]] 
Ahead to [[Scanning Probe Diffraction Quick Reference]] 
 
This reference is intended for staff or advanced users - steps are outlined with a minimum of detail 
Prior to this section make sure beamline alignment has been performed ([[Beamline Alignment Quick Reference]]) 

'''1) Verify optic alignment''' 
Perform [[CCD changeover]] to [[Coolsnap]] 
Drive focusing optic into beam, adjust OSAX and OSAY so outgoing focused beam is not clipped and remnant central parallel beam intensity is minimized 
Close NES slits to 0.1x0.1, adjust FOMX and FOMY to center optic on beam axis - outgoing wavefront as clipped by slits should look symmetric around the edges 
Record this as your "optic in" position, move FOMX so parallel beam is unobstructed with NES slits at 1x1 (should be ~+4000 relative move) - record this as your "parallel beam" position 

NOTES: 
i) Central stop may be offset from the center of optic - do not simply put image of central stop in the center of the beam footprint when aligning optic 
ii) Focal length in mm = (zp diameter in um)*(outermost zone width in nm)*(energy in keV)/1239.842 

'''2) Mount and visually inspect sample''' 
Move Objective Y to 0.0, rotate Sample Theta to 90 degrees, vent chamber 
Remove old sample, slide new sample stick into machined slot, verify sample is flush with bottom of slot 
Pump down chamber 
View sample from top camera, roughly adjust SAMZ to put surface on marked focal plane 
View sample from upstream camera, roughly adjust SAMY to put intended scanning region level with marked focal spot 

NOTES: 
i) Camera positions will not be accurate until chamber is pumped down 

'''3) Flatten sample with x-rays''' 
If phi alignment is necessary, move SAMX so a reference edge of the sample is visible in downstream parallel beam image 
Observe edge position under SAMY motion of +/-1000, adjust Sample Phi until visible edge is parallel to this motion 
Move Sample Theta to 0.0 degrees, during this motion watch upstream sample edge and adjust OSAZ and SAMZ as needed to avoid collision 
Move SAMX so the front face of the sample is visible as an edge in the downstream parallel beam image 
Adjust Sample Theta to find crossover between leading edge and trailing edge obstructing beam, set this to be user Theta=0.0 
Observe surface edge position under SAMY motion of +/-1000, adjust Sample Chi until visible edge is parallel to this motion 

NOTES: 
i) Stop coarse motors frequently during these steps 
ii) Make sure SAMY ends back up at coarse height found above at the end of this section 

'''4) Parallel beam diffraction alignment''' 
Mark NES slit center in Coolsnap image with crosshair 
Calculate substrate scattering condition using Bragg law calculator, drive Sample Theta and detector Two Theta to these values (keep surface on focal plane with SAMZ) 
Position fluorescent screen in front of Coolsnap viewable by outboard camera, find and coarsely optimize reflection using Sample Theta, remove screen 
Close NES vertical slits to 0.1, adjust Sample Chi to align streak vertically with marked slit center 
Open NES vertical slits, fine scan Sample Theta to maximize integrated ROI signal 
Close NES horizontal slits to 0.1, adjust detector Two theta to center reflection on marked slit center 
Re-open NES slits to 1x1, if any contrast is visible center intended scanning area in beam footprint using SAMX and SAMY (keep on focal plane with SAMZ) 
Calculate the difference between the film scattering condition and the substrate scattering condition using Bragg law calculator 
Make a two positioner theta/two theta scan relative to the current position encompassing both the substrate peak and the film peak 
Drive to the film peak, if any contrast is visible center intended scanning area in beam footprint using SAMX and SAMY (keep on focal plane with SAMZ) 

NOTES: 
i) Stop coarse motors frequently during these steps 
ii) Increase counting time substantially relative to substrate peak and view th/tth scan in log scale to find the film peak 
iii) When centering using diffraction topography crosshair position runs out from beam axis unless SAMX and SAMZ are correctly moved together, check this by closing NES slits 

'''5) Focused beam alignment''' 
Drive FOMX and FOMY to "optic in" position from step 1 
At film peak two theta perform [[CCD changeover]] to either [[PI-LCX]] or [[PIXIS-XF]] 
Move in outboard fluorescent detector and add as a detector trigger 
Scan SAMX and SAMY to coarsely find intended scanning region or object using diffractive and fluorescent contrast 
Once something is coarsely located (to within ~100um2), adjust SAMZ to bring sample surface to focal plane then stop all sample motor motion 
Activate hybrid optic motion by entering the current HybridX/HybridY readback values into the HybridX/HybridY command fields 
Find some local contrast - any diffraction or fluorescence signal that shows variation over a ~5um linear scan - and use this to focus 
Typical initial coarse focal scan correcting for known runout: 
{| {{table}} style="text-align:center"
| align="center" style="background:#f0f0f0;"|'''Outer loop positioners'''
| align="center" style="background:#f0f0f0;"|'''Scan width(#pts)'''
| align="center" style="background:#f0f0f0;"|'''Inner loop positioner'''
| align="center" style="background:#f0f0f0;"|'''Scan width(#pts)'''
|-
|-
| FOMZ ||400um (10pts) ||Hybrid Y ||5um (50 pts)
|-
| Hybrid X ||-2.0um (10pts) ||- ||-
|-
| Hybrid Y ||-1.2um (10pts) ||- ||-
|-
|}
Once coarse focus is obtained, reduce all outer loop positioners by a factor of four and re-scan to find fine focus 

NOTES: 
i) Do not expose PI detectors or outboard fluorescent detector when in "parallel beam" condition 
ii) Once enabled the Hybrid motion MUST be de-activated prior to any activation of X/Y coarse motors, and then re-enabled in the new readback position 
iii) Instrument temperature equilibration will be causing position drift during the focal scans, monitor object position with linear X/Y scans 
iv) After focusing, remove extra positioners and add reasonable soft limits around any motions likely to be scanned (to prevent "move to zero" crashes) 

[[Category:XMG]][[Category:Diffraction]][[Category:Controls]]

CCD changeover

2010-10-30T14:48:20Z

Mvholt:

Back to [[Sample Alignment Quick Reference]] 
 
This reference is intended as a checklist for staff or advanced users - steps are outlined with a minimum of detail 

'''1) Exit CCD software''' 
Access computer Mahler on a KVM station - bring up CCD Image Server software, hit File then Exit 

NOTES: 
i) If the SPiiPlus software is on and the Coolsnap focus motion is still connected, make sure the amplifier is disabled (hit disable motion for axis 0 on the motion control screen) 
 
'''2) Power down CCD''' 
When removing [[Coolsnap]] detector switch off small rocker switch on back, then rocker switch on the larger bottom power supply on detector arm, disconnect data and power cables, and organize cables for focus motion 
When removing [[PIXIS 1024XF]] detector switch off rocker switch on the smaller top power supply on detector arm, disconnect data cable, power cable, and logic out - shutter BNC cable 
When removing [[PI-LCX]] detector unplug controller power cord marked PI-LCX on outboard wall, disconnect large data cable (first slide retaining clip to the left), disconnect controller-shutter BNC barrel 

NOTES: 
i) If removing Coolsnap make sure amplifier is disabled for focus motion prior to disconnecting any cables to the nanomotion amplifier or encoder 
 
'''3) Remove / replace CCD''' 
All CCDs dismount with 3x 10-32 screws on the base, then slide straight out, gently rocking if necessary - mount new CCD in the same way 

NOTES: 
i) Be extremely careful jostling Coolsnap tube lens - treat as if it could strip out from the face at any moment 
ii) Place Coolsnap on its right hand side with the nanomotion motor facing up when storing 
 
'''4) Connect / Power up CCD''' 
When mounting [[Coolsnap]] detector connect both the data and power cables, then switch on the larger bottom power supply on detector arm, then switch on small rocker switch on back 
When mounting [[PIXIS 1024XF]] detector connect the data cable, power cable, and logic out BNC - shutter BNC cable, then switch on rocker switch on the smaller top power supply on detector arm 
When mounting [[PI-LCX]] detector connect the large data cable (then slide retaining clip to the right to lock), and connect controller logic cable-shutter BNC cable with a barrel, then plug controller power cord marked PI-LCX on outboard wall 

NOTES: 
i) After power on, verify the cooling fans on the mounted CCD are operational - audible on all three CCDs 
 
'''5) Select appropriate shutter mode''' 
When mounting [[Coolsnap]] detector set flick switch on Aszol shutter control at front of hutch to Manual Open (green light should be on) 
When mounting [[PIXIS 1024XF]] or [[PI-LCX]] detector set flick switch on Aszol shutter control at front of hutch to Remote Control 

NOTES: 
i) Audible clicking should be heard when flick switch is cycled 
 
'''6) Set up CCD software for new detector''' 
Start CCD software by double clicking icon on desktop 
Click Setup --> Hardware, hit "ok" on Photometrics screen, then select either Coolsnap or PI-LCX on the next menu 
If an error window pops up during this, move it all the way to the side and continue (DO NOT acknowledge the error now) 
Enter a nominal exposure time (eg 1 sec), and enter -30 for temperature 
If an error occured during the previous steps - before proceeding hit file -- exit, then acknowledge the error to kill the program, restart the program 
Click Setup --> Acquisition, set the exposure time to 1sec and temperature to -30 again if necessary 
Your window should look like the size of the CCD chip at this point, and hitting acquire should give you an image 
Set number of ROIs to 5, DO NOT acknowledge the error this generates - move the error window to the side and continue 
Click File - exit - ok, then acknowledge the error 
Start the software again, verify number of ROIs is 5, hit setup - acquisition to verify temperature and acquisition time parameters, then acquire an image 

NOTES: 
i) Use ROI and Use Calculations buttons must be checked for scan record PVs such as R01.Average to connect 
 
'''7) Set Two Theta and Gamma calculation offsets''' 
From main beamline screen, click DET - Detector Motors screen, then click the Config button on the bottom right of this screen 
On the row marked Y detector CHANGE HERE - input 3.85 for the [[Coolsnap]] and 0.0 for either of the other detectors, then close this window 
From main beamline screen, click IOCs -- 26ID IOC List -- 26idcDET -- Placeholders -- AnalogOUT 
On the row marked X detector CHANGE HERE - input 0.25 for the [[Coolsnap]] and 0.0 for either of the other detectors, then close this window 
Drive the Two theta and Gamma to the desired position for alignment (typically 0, 0) - these should now be correct to center the beam on detector 

NOTES: 
i) If gamma calculation is not moving as the Ydet and Zdet appear hung up, you may need to run restartioc on the DET e-brick

Restart an IOC

2010-10-19T15:01:07Z

Mvholt:

Back to [[X-Ray Microscopy]]

1) ssh to IOC (e.g., ssh epicsioc@ioc26idcdet) 
2) password epicsioc 
3) restartioc 

You also can 'shutdown' or 'reboot' the IOC but do this only if power is about to be removed

[[Category:XMG]][[Category:Controls]]

Beamline Alignment Quick Reference

2010-10-06T14:21:57Z

Mvholt:

Back to [[X-Ray Microscopy]]

'''1) Select x-ray energy:''' 
Calculate scattering angle of Si 111 for desired energy with Bragg law calculator (or approximate Theta ~ asin(1.977084/E keV) ) 
Bring up alignment motor tab via DCM flag on main beamline screen - DCM soft motors 
Drive DCM Theta to the correct Bragg angle for the desired energy 
Drive both undulators to the desired energy plus an approximate offset of +0.1keV 

NOTES: 
i) If DCM theta looks low for the current energy (~2-4 deg) you may need to re-set user offset (current calibrated theta offset = dial + 8.646deg) 
ii) Approximate undulator offsets are ~ desired energy +0.1 keV at ~8keV, +0.2keV at 12 keV 

'''2) Scan mirror piezo:''' 
Set slits to
{| {{table}} style="text-align:center"
| align="center" style="background:#f0f0f0;"|'''Slit'''
| align="center" style="background:#f0f0f0;"|'''H Size (mm)'''
| align="center" style="background:#f0f0f0;"|'''V Size (mm)'''
|-
|-
| PBS || 0.2 || 2
|-
| NES || 2 || 2
|-
| BDA || 2 ||| -
|}
Scan mirror piezo with a scan width of ~2V, ~ 21 points. 
Set mirror piezo to the maximum intensity. 
NOTES: 
i) mirror piezo feedback should be OFF (MIR flag on main beamline screen) 
ii) CCD azsol shutter should be set to "manual open" or removed from beam path 
 

'''3) Scan DCM 2nd crystal roll:''' 
Set slits to
{| {{table}} style="text-align:center"
| align="center" style="background:#f0f0f0;"|'''Slit'''
| align="center" style="background:#f0f0f0;"|'''H Size (mm)'''
| align="center" style="background:#f0f0f0;"|'''V Size (mm)'''
|-
|-
| PBS || 0.2 || 2
|-
| NES || 0.2 || 2
|-
| BDA || 2 ||| -
|}
Scan DCM Chi2 (roll) with a scan width of ~0.2 mrad, 21 pts, (at least 1 sec of positioner settling time) 
Set roll to maximum intensity - correct for backlash. 
NOTES: 
i) Correct for backlash by driving to first scan point, then to maximum (e.g. after scan drive relative position -0.1, then drive absolute position to max) 
ii) Settling time of at least 1 second is necessary for this scan (this axis is UHV picomotor driven in PID)

'''4) Scan DCM 2nd crystal pitch:''' 
Set slits to
{| {{table}} style="text-align:center"
| align="center" style="background:#f0f0f0;"|'''Slit'''
| align="center" style="background:#f0f0f0;"|'''H Size (mm)'''
| align="center" style="background:#f0f0f0;"|'''V Size (mm)'''
|-
|-
| PBS || 2 || 2
|-
| NES || 2 || 2
|-
| BDA || 2 ||| -
|}
Find DCM piezo motor via IOCs flag - DCM - motors - motor 1 (or manually enter in scan window 26idbDCM:m1.VAL) 
Scan control voltage for DCM piezo tweak with a scan width of ~3V, 21pts. 
Set piezo to maximum intensity. 
NOTES: 
i) DCM feedback should be OFF (DCM flag on main beamline screen) 
ii) if voltage is trending out of range (1V<V<9V), set tweak to 4.5V and scan theta2 motion +/- 0.1mrad 

'''5) Scan Undulators:''' 
Scan upstream and downstream undulators with a scan width of 0.5 keV (1 sec settling time), drive to maximum intensity 
NOTES: 
i) Settling time of at least 1 second is necessary for this scan (possibly more) 

'''6) Optional - scan BDA:''' 
Set slits to
{| {{table}} style="text-align:center"
| align="center" style="background:#f0f0f0;"|'''Slit'''
| align="center" style="background:#f0f0f0;"|'''H Size (mm)'''
| align="center" style="background:#f0f0f0;"|'''V Size (mm)'''
|-
|-
| PBS || 0.2 || 2
|-
| NES || 0.2 || 2
|-
| BDA || 0.2 ||| -
|}
Scan BDA horizontal center with a scan width of ~0.6mm, 21pts. 
Set BDA horizontal center to maximum intensity 
Return horizontal BDA width to 2mm for full beam, 0.025mm for horizontally coherent scanning probe beam 
NOTES: 
i)This scan is optional if BDA is not being used or if the results of the horizontal alignment (steps 2 and 3 above) are similar to previous. 
[[Category:XMG]][[Category:Controls]][[Category:Beamline]]

Scanning Probe Diffraction Quick Reference

2010-09-20T15:02:22Z

Mvholt:

Back to [[Diffraction]]

This reference is intended for general users, notify staff of necessary revisions or to request more detail 
Prior to this section it is expected that sample alignment has been performed ([[Sample Alignment Quick Reference]]) 
All MEDM windows below can be found from the main beamline MEDM screen, to bring up this screen double click the desktop icon "26id MEDM" or type "start_epics" on a terminal screen 
'''To process a new value in any MEDM command field this window MUST be selected (left click or double click) and the mouse MUST remain pointed into that field until the user enters the new value AND hits return''' 

'''1) Setting up scan parameters''' 
If necessary call up the scan1 and scan2 windows from the main beamline screen (found under SCANS-DCM on the bottom left), then hit the bottom right More button twice on each window 
Remove prior positioners by double clicking the drive field until the text is highlighted, backspace, then return 
Add a new positioner by middle clicking on the intended motor's command value field, holding the middle button down, dragging to the drive field in the scan window, then release the middle button, left click, then return 
Select scanning range by EITHER adjusting the Start and End values OR adjusting the Center and Width values 
Select scanning steps by EITHER adjusting the Step Size value OR adjusting the #PTS value on the top right of the window 
For additional positioners in a single linear scan (ie to make a theta/two theta scan) click the green Positioners title box, and follow the above steps to modify the fields for positioners 2-4 
For a two dimensional scan, follow the above steps to add outer loop positioners and scanning ranges into the scan2 window (do not add any detectors or modify the detector triggers in this window) 

NOTES: 
i) Make sure the flags below the scan parameter fields are set to LINEAR, RELATIVE, and PRIOR POSITION (to set up other types of scans consult staff) 
ii) Make sure the number of active positioners (in parentheses to the right of the green positioners button) is correct, and that additional positioners from previous scans are removed 
iii) Make sure the positioner settling time is appropriate for the slowest motor, usually 0.2-0.5 sec - in many cases (soft motors, picomotors, or undulators) this should be at least 1 second 
iv) Do not use the "Clear positioners" button, this sets the scan type to "absolute" for all positioners 
v) An X next to the drive field should briefly flash if the new positioner is added correctly, and the units field should update to the new motor units 
 
'''2) Adding detector triggers''' 
Remove unneeded detector triggers by double clicking the pink value field until the text is highlighted, backspace, then return 
To activate scaler counters, select 32ch Scaler from the Scalers tab in the bottom right of the main beamline screen, drag the Count button to a DetTrigger field (then left click in the window, return) 
To activate fluorescence detectors, select 16-element SDD from the EDS tab in the middle left of the main beamline screen, drag the Erase/Start button to a DetTrigger field (then left click, return) 
To activate the CCD detector enter 26id:ccd.AcquireCLBK in a DetTrigger field 
Set the acquisition time of all three of these objects to the same value -if the CCD shutter is in use increase the exposure time for the scaler counter and fluorescence detector by ~0.2sec above the CCD exposure time 

NOTES: 
i) If saving images from the CCD make sure the change directory triggers are in the before scan and after scan placeholders in the scan1 window (consult with staff if these are absent) 
ii) If the NPI has thermally equilibrated it's convenient to add 26idcnpi:coarse:allstop to an unused DetTrigger field to ensure no coarse motors are left on 
iii) Make sure the scaler counter is set to single shot (that autocount is turned OFF) 
 
'''3) Adding detector channels''' 
To bring up an overview of current active detectors click on "DCM scan record detectors" on the NPI tab in the middle left of the main beamline screen (this screen cannot modify detector channels) 
To modify detector channels click on the green Detectors title box and bring up the appropriate subwindow for the detector channel range (1-10, 11-20, ..., or 51-60) 
Remove unneeded detectors by double clicking the pink value field of one of these subwindows until the text is highlighted, backspace, then return 
To add a new detector channel middle click on any process variable, drag to an available detector value field, then left click, return 

NOTES: 
i) Do not add more than 60 detectors 
ii) For more detail reference [[scanning probe detector channel descriptions]] 
 
'''4) Scanning the Nanoprobe Instrument''' 
The coordinate system for all NPI motors is a right hand rule about the beam propagation direction: +Z is downstream, +Y is up (vertical), +X is outboard (horizontal - pointing away from the ring wall) 
The usual alignment procedure calls for coarse scanning of the sample X/Y, and then fine scanning of the focusing optic X/Y - remember if both are scanned negative to positive these scans will appear inverted from each other in both axes 
When the sample is positioned at a diffraction angle, the horizontal scanning motion will travel further relative to the surface of the sample than the same vertical motion - apparent feature size will be compressed in X 
For an aspect ratio corrected square 2D scan of side length L that will appear like a top down microscope view of surface features, set Hybrid Y scan width = L in the outer loop, and set Hybrid X scan width = L*sin(theta) in the inner loop 
Due to the diffraction angle a horizontal X scan will also affect the Z positioning of the sample surface relative to the focal plane 
If the value of L*cos(theta) is greater than the depth of focus in the above scan, (more generally if for any scan (X scan width)/tan(theta)>DOF) ADD Focus Z as a second positioner to the X scan (Z scan width = L*cos(theta) OR (X scan width) / tan(theta))

NOTES: 
i) Once an object is found, you may want to re-verify the focus on this object (follow the example scan in part 5 of [[Sample Alignment Quick Reference]])

Scanning probe detector channel descriptions

2010-09-10T19:02:14Z

Mvholt:

Back to [[Scanning Probe Diffraction Quick Reference]]

'''Typical definitions of 26ID scan detector channels''' 
 
{| {{table}} style="text-align:left"
| align="center" style="background:#f0f0f0;"|'''Detector Channel number'''
| align="center" style="background:#f0f0f0;"|'''EPICS Process variable'''
| align="center" style="background:#f0f0f0;"|'''Description'''
|-
|-
| D01 ||26idsclr1:scaler1.S1 ||I0 - Integrated Ion chamber current after NES slits (change current amplification via yellow SR570 tab on main beamline screen)
|-
| D02 ||26idcXMAP:mca5.R1 ||Bi - Fluorescence channel from outboard detector, summed ROI#1 - find and modify with MCA software from User Tools tab on main beamline screen
|-
| D03 ||26idcXMAP:mca5.R2 ||Ti - Fluorescence channel from outboard detector, summed ROI#2 - find and modify with MCA software from User Tools tab on main beamline screen
|-
| D04 ||26idcXMAP:mca5.R5 ||Fe - Fluorescence channel from outboard detector, summed ROI#5 - find and modify with MCA software from User Tools tab on main beamline screen
|-
| D05 ||26id:ccd.R01.Average ||Integrated Intensity/Num Pixels for CCD ROI#1 - ROI#1 defines the total active chip area to be saved, so this is the total CCD intensity per pixel
|-
| D06 ||26id:ccd.R02.Average ||Integrated Intensity/Num Pixels for CCD ROI#2 - usually tightly defined around the outgoing beam - Contrast here is related to diffracting volume
|-
| D07 ||26id:ccd.R02.XCentroid ||X center of mass of intensity in CCD ROI#2 - This is related to lattice strain and rotation in the diffraction plane, scales away from center of ROI2 with signal/dark current
|-
| D08 ||26id:ccd.R02.YCentroid ||Y center of mass of intensity in CCD ROI#2 - This is related to lattice rotation out of the diffraction plane, scales away from center of ROI2 with signal/dark current
|-
| D09 ||26idcDET:userCalc3.VAL ||R02.Average - R03.Average, Background subtracted average intensity - ROI#3 typically set around an unused area, this is useful for viewing scans in progress with low contrast
|-
| D10 ||26idcDET:userCalc6.VAL ||CCD Image number - If you are using the CCD DO NOT MODIFY THIS CHANNEL as it is necessary for Matlab analysis routines
|-
| || ||
|-
| D11 ||26idctsrc:DMM1:Ch1_raw.VAL ||Channel 1 - C Hutch digital multimeter - FOMX temperature
|-
| D12 ||26idctsrc:DMM1:Ch2_raw.VAL ||Channel 2 - C Hutch digital multimeter - FOMY temperature
|-
| D13 ||26idctsrc:DMM1:Ch3_raw.VAL ||Channel 3 - C Hutch digital multimeter - FOMZ temperature
|-
| D14 ||26idctsrc:DMM1:Ch4_raw.VAL ||Channel 4 - C Hutch digital multimeter - SAMX temperature
|-
| D15 ||26idctsrc:DMM1:Ch5_raw.VAL ||Channel 5 - C Hutch digital multimeter - SAMY temperature
|-
| D16 ||26idctsrc:DMM1:Ch6_raw.VAL ||Channel 6 - C Hutch digital multimeter - SAMZ temperature
|-
| D17 ||26idctsrc:DMM1:Ch7_raw.VAL ||Channel 7 - C Hutch digital multimeter - SAM Theta temperature
|-
| D18 ||26idpvc:userStringCalc3.VAL ||Time of day - Units are fractional hours (ie 22.5 = 10:30pm) - use min and max of a linear scan to accurately estimate 2D scanning times, discontinuity in this channel indicates a hung scan
|-
| D19 ||- ||-
|-
| D20 ||- ||-
|-
| || ||
|-
| D21 ||B26ID-CG-DCM-01:PFEED ||Feed pressure of LN2 cryocooler internal circuit - spikes at refill, adjust fill cycle levels and remove ice from vent line to minimize this
|-
| D22 ||B26ID-CG-DCM-01:MNLEV ||Cryocooler main vessel LN2 level - direct measure of LN2 fill cycle, dewar currently is kept between 80-60% full
|-
| D23 ||26id:BLEPS:MIRROR TEMP 01:RBV ||First mirror temperature - RTD readout - useful to monitor equilibration after a beam dump
|-
| D24 ||26id:BLEPS:MIRROR TEMP 02:RBV ||Second mirror temperature
|-
| D25 ||26id:BLEPS:XTAL_TEMP_01:RBV ||DCM first crystal temperature - typically -234 deg F
|-
| D26 ||26id:BLEPS:XTAL_TEMP_02:RBV ||DCM second crystal temperature - typically -171 deg F
|-
| D27 ||26idctsrc:bpmds:current:total ||Alternate I0 - integrated intensity on all four quadrant diodes at the front of C Hutch - mono beam intensity measurement that does not depend on NES slit settings or exposure times
|-
| D28 ||26idctsrc:bpmds:pos:x ||Approximate X (horizontal) position of mono beam in microns at the front of C hutch - related to mirror piezo and DCM chi2 stability
|-
| D29 ||26idctsrc:bpmds:pos:y ||Approximate Y (vertical) position of mono beam in microns measured at the front of C hutch - primarily related to DCM theta2 stability
|-
| D30 ||S:SRcurrentAI ||Alternate I0 - APS storage ring current value, useful for normalizing long scan data when the ring is not in top-up mode - unexpected changes of this value indicate orbit/steering loss or beam dump
|-
| || ||
|-
| D31 ||26idbDCM:userCalc1.VAL ||Fe fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#8
|-
| D32 ||26idbDCM:userCalc2.VAL ||Cu fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#11
|-
| D33 ||26idbDCM:userCalc3.VAL ||Zn fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#13
|-
| D34 ||26idbDCM:userCalc4.VAL ||Co fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#9
|-
| D35 ||26idbDCM:userCalc5.VAL ||Ti fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#4
|-
| D36 ||26idbDCM:userCalc6.VAL ||Ca fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#3
|-
| D37 ||26idbDCM:userCalc7.VAL ||Mn fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#7
|-
| D38 ||26idbDCM:userCalc8.VAL ||Si fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#1
|-
| D39 ||26idbDCM:userCalc9.VAL ||Al fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#0
|-
| D40 ||26idbDCM:userCalc10.VAL ||K fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#2
|-
| || ||
|-
| D41 ||26idbPBS:userCalc5.VAL ||V fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#5
|-
| D42 ||26idbPBS:userCalc4.VAL ||Full spectra - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) over all energies- ROI#15
|-
| D43 ||26idbPBS:userCalc6.VAL ||P fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#14
|-
| D44 ||26idbDCM:userCalc8.VAL ||Au fluorescence - Integrated signal from the four elements of the inboard detector (26idcXMAPmca1 - 26idcXMAPmca4) - ROI#10
|-
| D45 ||- ||-
|-
| D46 ||26id:ccd.Milliseconds ||CCD exposure time - useful for scan to scan normalization
|-
| D47 ||26idcXMAP:PresetReal ||Fluorescence detector exposure time
|-
| D48 ||- ||-
|-
| D49 ||- ||-
|-
| D50 ||- ||-
|-
| || ||
|-
| D51 ||26idcnpi:m10.RBV || Focus X readback value - these next ten detectors are the absolute positions of the NPI scanning axes this should allow you to fully recreate the NPI scanning position at any data point
|-
| D52 ||26idcnpi:m11.RBV ||Focus Y readback value
|-
| D53 ||26idcnpi:m12.RBV ||Focus Z readback value
|-
| D54 ||26idcnpi:m16.RBV ||Sample X readback value
|-
| D55 ||26idcnpi:m17.RBV ||Sample Y readback value
|-
| D56 ||26idcnpi:m18.RBV ||Sample Z readback value
|-
| D57 ||26idcnpi:m20.RBV ||Sample Theta readback value
|-
| D58 ||26idcDET:base:Theta_d ||Two theta detector position
|-
| D59 ||26idcnpi:m34.RBV ||Piezo X readback value - differential Focus-Sample X position measured by the laser reference frame
|-
| D60 ||26idcnpi:m35.RBV ||Piezo Y readback value - differential Focus-Sample Y position measured by the laser reference frame
|-
|}

Diffraction

2010-09-08T14:19:29Z

Mvholt: /* For Users */

Back to [[X-Ray Microscopy]]

===For Users ===
*[[Sample Alignment Quick Reference]]
*[[Scanning Probe Diffraction Quick Reference]]
*[[Data Analysis Quick Reference]]

===Nanoprobe Instrument===
*[[Focusing optics module (FOM)]]
*[[Condenser module (CM)]]
*[[Imaging optics module (IOM)]]
*[[Sample module (SM)]]
*[[NPI Manuals]]
*[[media:nanoPi_usersmanual_2007_07_20.pdf|Manual for Nanoprobe Instrument]]

===Detectors===
*[[Coolsnap]]
*[[PIXIS 1024XF]]
*[[PI-LCX]]
*[[MAR185]]

===Optics===
*[[Focusing zone plates]]
*[[Imaging zone plates]]

===Links===
[http://xdb.lbl.gov X-ray Data Booklet]
[[image:DataBook_Image_Small.jpg]] 
[http://www.desy.de/~luebbert/CrystalCalc_Cubic.html Bragg law calculator] 
[http://henke.lbl.gov/optical_constants/ X-ray interactions with matter]
[[Category:XMG]][[Category:Diffraction]][[Category:Controls]]

Beamline alignment

2010-09-07T19:25:30Z

Mvholt:

Back to [[X-Ray Microscopy]]
*[[Mirror system]]
*[[Beamline Alignment Quick Reference]]
[[Category:XMG]][[Category:Controls]][[Category:Beamline]]

Beamline aligning sequence

2010-09-07T19:24:37Z

Mvholt: moved Beamline aligning sequence to Beamline Alignment Quick Reference: accessibility

#REDIRECT [[Beamline Alignment Quick Reference]]