Difference between revisions of "Calibrations"
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===Setup=== | ===Setup=== | ||
| − | * Take a dark count run with aluminium sample and | + | * Take temperature reading |
| + | * Take a dark count run with aluminium sample and lamp off | ||
* 30s measurement time | * 30s measurement time | ||
| − | * Repeat in | + | * Repeat in the lamp beam with closed slit if possible to test light leakage |
* With all SiPMs | * With all SiPMs | ||
| − | |||
* Measure lamp | * Measure lamp | ||
* Move grating with motor to calibrate motor control | * Move grating with motor to calibrate motor control | ||
| − | * Move grating and measure intensity at each wavelength (in | + | * Move grating and measure intensity at each wavelength (in predefined steps) |
| − | * Compare this to the expected spectrum | + | * Compare this to the expected spectrum plus SiPM response |
* Repeat for all SiPMs | * Repeat for all SiPMs | ||
* Compare spectra between SiPMs | * Compare spectra between SiPMs | ||
| − | * Sweep SiPMs across the beam (in | + | * Sweep SiPMs across the beam (in predefined steps) |
Revision as of 14:37, 18 November 2022
Calibration checklist
Cleaning
* Clean chamber * Take apart * Clean modules - BOSIMANITE AL-29 followed by ROGYPAL CA-307 Z, bake for 80*C for 18 hours * Clean O-rings - Isopropanol * Put chamber together (check configuration required) * Reconnect monochromator * Adjust height to prevent bending of modules during pumping * Connect securely * Clean sample holder - isopropanol * Central piece * Three frames * Three doors * Suspension support * Screws/springs * Clean cooling apparatus - isopropanol * Cooling braids * Screws/springs * Clean base aluminium sample - isopropanol * Clean readout equipment which will be inside chamber (wires) - isopropanol * Clean SiPM holder - isopropanol
Reassembly
* Install temperature sensor * Install sample holder with samples * Reconnect cooling apparatus * Cooling braids * Screws/springs * Install SiPM holder * Visually test that it is in line * Reconnect readout equipment * Test to make sure all connections are secure * Pull vacuum down to e-3mbar
Setup
* Take temperature reading * Take a dark count run with aluminium sample and lamp off * 30s measurement time * Repeat in the lamp beam with closed slit if possible to test light leakage * With all SiPMs * Measure lamp * Move grating with motor to calibrate motor control * Move grating and measure intensity at each wavelength (in predefined steps) * Compare this to the expected spectrum plus SiPM response * Repeat for all SiPMs * Compare spectra between SiPMs * Sweep SiPMs across the beam (in predefined steps)