Page History
Based on e-mail exchange between Mikhail, Gabriel, Jack, Faisal, Philip.
For composite detectors see EPIX10KA2M and EPIX10KAQUAD
Content
Table of Contents |
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Pictures from Gabriel's presentation
Chris Kenney:
- sensor regular pixel size 100x100 µm²,
- shown on plot gap pixels 100x250100x225 µm² and four central pixels 250x250225x225 µm².
- See plot for composite detectors in EPIX10KA2M and EPIX10KAQUAD
Configuration objects for epix10ka
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Each pixel value is represented over 16 bits; the lowest 14 bits (0 to 13) encode the 14-bit ADC value, and bit 14 encodes the gain mode as either High (bit14==1) or Medium/Low (bit14==0) !!! THIS IS WRONG. SHOULD BE bit14==1/0 for L/H,M !!!. The choice between Medium and Low is determined globally for the ASIC by the asic.trbit.
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Calibration rows
Each ASIC has (176+2 rows x 192 columns), the last two rows are the calibration rows. These rows are not connected to the sensor and are constructed without a pixel/sensor interface. They will be powered just like any other pixel in the ASIC, therefore, they see similar voltages, noise, etc just like other pixels.
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wirebonds
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#¯¯¯¯|¯¯¯¯#
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Raw data
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Command: find_detector_runs MFX epix10ka # mfxx32516: nruns 3-377, MfxEndstation.0:Epix10ka.0, MfxEndstation.0:Epix10ka.1 # mfxx36916: runs 1-84, MfxEndstation.0:Epix10ka.1 |
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Camera1-AHL-H-Gain.txt Camera1-AHL-L-Gain.txt Camera1-AML-L-Gain.txt Camera1-AML-M-Gain.txt Camera1-FH-H-Gain.txt Camera1-FL-L-Gain.txt Camera1-FM-M-Gain.txt |
Archived in /reg/g/psdm/detector/gains/epix10k/2018-06-04-Camera1/
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#-------------------------------- # data bit 14 is moved here #1/0 for H,M/ trbitL # V / trbit 1/0 for H/M # V / bit3 1/0 for F/A # V / bit2 1/0 for H,M/L # V / M mask # V / T test gain range index # V / / in calib files # V V # x111xx =28 - FH_H 0 # x011xx =12 - FM_M 1 # xx10xx = 8 - FL_L 2 # 1100xx0100xx =4816 - AHL_H 3 # 1000xx0000xx =32 0 - AML_M 4 # 0100xx1100xx =1648 - AHL_L 5 # 0000xx1000xx =32 0 - AML_L 6 # 1101xx =49 - AHL_FL 7 # 1001xx =33 - AML_FL 8 #-------------------------------- |
Data | config | asicPixelConfigArray | |||||
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Index | Gain mode | bit14 | trbit | bit3: ga | bit2: g | bit1: Mask | bit0: Test |
0 | FH_H | x | 1 | 1 | 1 |
1 | FM_M | x | 0 | 1 | 1 |
2 | FL_L | x | x | 1 | 0 |
3 | AHL_H |
0 | 1 | 0 | 0 |
4 | AML_M |
0 | 0 | 0 | 0 |
5 | AHL_L |
1 | 1 | 0 | 0 |
6 | AML_L |
1 | 0 | 0 | 0 |
7 |
AHL Forced L | 1 | 1 | 0 | 1 | |||
8 | AML Forced L | 1 | 0 | 0 | 1 | ||
pixel control bit array | 1<<5 =32 |
1<<4 =16 | 1<<3 =8 | 1<<2 =4 | Not used | Not used |
Gain correction formula
corrected = (raw - pedestals)/gain
corrected = (raw - pedestals)/gain
Anchor MeetingWithGabriel MeetingWithGabriel
Common mode correction
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Added on 2020-06-04.
The value (raw - pedestals) can be corrected for common mode effect.
First image below shows one epix10ka segment non-corrected image of shape (352, 384). Vertical stripes presumably arising from this hardware effect.
The same median algorithm is applied as for Jungfrau, but separately for up- and down- part of the segment with parameters
cmpars=(<algorithm-id>, <mode>, <maximal-correction>), where
- algorithm-id is not used
- mode=0 - no correction, bit1=1 - in rows (is not useful for epix10ka), bit2=1 - in columns (the best for epix10ka)
- maximal-correction - maximal allowed correction in ADU
NOTE: currently mask on gain mode is not applied - all pixels are used to evaluate and correct for offset.
Examples of the command to get corrected image:
nda_cdata = det.calib(evt, cmpars=None) # default - cm pars from calib directory/system
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Meeting with Gabriel
On 2018-07-06 15:13 meeting with Gabriel.
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/reg/d/psdm/MFX/mfxx32516/calib/Epix10ka::CalibV1/MfxEndstation.0:Epix10ka.0/pedestals/0-end.data
Pedestal Deployment Meeting Notes (8/2/18)
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Code Block |
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#== type 0022 epix10ka 'DetLab.0:Epix10ka.0': 'epix10ka_0000',\ 'MecTargetChamber.0:Epix10ka.0': 'epix10ka_0001',\ 'MecTargetChamber.0:Epix10ka.1': 'epix10ka_0002',\ 'MfxEndstation.0:Epix10ka.0': 'epix10ka_0003',\ 'MfxEndstation.0:Epix10ka.1': 'epix10ka_0004',\ 'MfxEndstation.0:Epix10ka.2': 'epix10ka_0005',\ |
Composite detectors
EPIX10KA2M and EPIX10KAQUAD - composite detectors made of epix10ka panels.
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- https://github.com/slaclab/cac/tree/master/psana/epix10ka - scripts from Faisal
- https://pswww.slac.stanford.edu/apps/portal/index.php?exper_id=1107 - under Workflow -> Batch Processing - batch processing
- /reg/d/psdm/MFX/mfxx32516/results/abunimeh/2 - experimental and jupyter notebook scripts
- ePix10K Calibration, by Gabriel Blaj
- EPIX10KA2M and EPIX10KAQUAD
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- Jungfrau and Epix10ka Calibration
- 2021-09-28 learn about existence of presentation 2019-10-02-ePix10K-500um-Sensor-Geometry.pdf