Difference between revisions of "Calibrations"

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Line 7: Line 7:
 
     * Clean modules - BOSIMANITE AL-29 followed by ROGYPAL CA-307 Z, bake for 80*C for 18 hours
 
     * Clean modules - BOSIMANITE AL-29 followed by ROGYPAL CA-307 Z, bake for 80*C for 18 hours
 
     * Clean O-rings - Isopropanol  
 
     * 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
 
  * Clean sample holder - isopropanol
 
     * Central piece  
 
     * Central piece  
Line 26: Line 22:
 
===Reassembly===
 
===Reassembly===
  
 +
* Put chamber together (check configuration required)
 +
* Reconnect monochromator
 +
    * Adjust height to prevent bending of modules during pumping
 +
    * Connect securely
 
  * Install temperature sensor
 
  * Install temperature sensor
 
  * Install sample holder with samples
 
  * Install sample holder with samples
Line 41: Line 41:
 
  * Take temperature reading
 
  * Take temperature reading
 
  * Take a dark count run with aluminium sample and lamp off
 
  * Take a dark count run with aluminium sample and lamp off
     * 30s measurement time
+
     * Record 10 sets of 10,000 waveforms 12us long (takes around 15 minutes each set)
 
     * Repeat in the lamp beam with closed slit if possible to test light leakage
 
     * Repeat in the lamp beam with closed slit if possible to test light leakage
 
     * With all SiPMs
 
     * With all SiPMs

Latest revision as of 09:58, 24 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 
* 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

* Put chamber together (check configuration required)
* Reconnect monochromator
   * Adjust height to prevent bending of modules during pumping
   * Connect securely
* 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
   * Record 10 sets of 10,000 waveforms 12us long (takes around 15 minutes each set)
   * 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)