Difference between revisions of "Calibrations"
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(Created page with "=====Calibration checklist===== * Clean chamber (ultrasonic bath and isopropanol) * Take apart * Clean modules * Clean O-rings * Put chamber together (with new...") |
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* Clean O-rings | * Clean O-rings | ||
* Put chamber together (with new modules including LN2 trap, solid bottom plate and central feedthrough) | * Put chamber together (with new modules including LN2 trap, solid bottom plate and central feedthrough) | ||
| − | * Clean grating/window of monochromator (isopropanol) | + | * <s>Clean grating/window of monochromator (isopropanol)</s> Do not touch the surface of the grating or the lamp window with any material! Do not put solvents on it. |
* Reconnect monochromator | * Reconnect monochromator | ||
* Adjust height to prevent bending of modules during pumping | * Adjust height to prevent bending of modules during pumping | ||
Revision as of 11:22, 21 October 2022
Calibration checklist
* Clean chamber (ultrasonic bath and isopropanol) * Take apart * Clean modules * Clean O-rings * Put chamber together (with new modules including LN2 trap, solid bottom plate and central feedthrough) *Clean grating/window of monochromator (isopropanol)Do not touch the surface of the grating or the lamp window with any material! Do not put solvents on it. * Reconnect monochromator * Adjust height to prevent bending of modules during pumping * Connect securely * Clean sample holder (ultrasonic bath and isopropanol) * Central piece * Three frames * Three doors * Suspension support * Clean base aluminium sample (ultrasonic bath and isopropanol) * Install sample holder with aluminium sample (for dark count measurements) * Clean cooling apparatus (ultrasonic bath and isopropanol) * Cooling braids * Screws/springs * Reconnect cooling apparatus * Cooling braids * Screws/springs * Clean readout equipment which will be inside chamber (wires) (isopropanol) * Clean SiPM holder (ultrasonic bath and isopropanol) * 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 * Take a dark count run with aluminium sample and slits closed * 30s measurement time * Repeat in and out of the lamp beam if possible * With all SiPMs * Measure lamp * Move grating with motor to calibrate motor control * Move grating and measure intensity at each wavelength (in 10nm steps) * Compare this to the expected spectrum * Repeat for all SiPMs * Compare spectra between SiPMs * Sweep SiPMs across the beam (in 5mm steps)