Scanning probe detector channel descriptions
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Typical definitions of 26ID scan detector channels
| Detector Channel number | EPICS Process variable | 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 |
