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gas_handling_system [2013/12/13 20:58]
pereira created
gas_handling_system [2013/12/13 21:06]
pereira
Line 15: Line 15:
   * A log file should be specified before operating the gas handling system   * A log file should be specified before operating the gas handling system
       * A window automatically pops up asking for the name of the log file when the program starts       * A window automatically pops up asking for the name of the log file when the program starts
-      * Use the number of the current experiment (or “test”) as the name of the log file and save in file  +      * Use the number of the current experiment (or “test”) as the name of the log file and save in file /intranet/files/departments/operations/s800/TO_BE_SPECIFIED
-//intranet/files/departments/operations/s800/TO_BE_SPECIFIED+
       * The On indicator next to Is VI running? will flash until a log file is specified and the program initiates communications with the hardware       * The On indicator next to Is VI running? will flash until a log file is specified and the program initiates communications with the hardware
  
Line 29: Line 28:
  
  
-Preparation of Gas bottles+===== Preparation of Gas bottles ===== 
 + 
 +==== In Data-U6 ==== 
 +      * Ensure I265GV is closed to isolate focal plane vacuum chamber from the rest of the beamline 
 +      * Confirm that the focal plane chamber is under vacuum 
 +      * Confirm that the only open gas handling system valves are 4, 5, 6, 20, 21, and 22 
 + 
 +==== In the S3 vault ==== 
 +      * Ensure that the gas handling system roughing pump is running and has a good vacuum 
 +           * The pump sits on the floor under the focal plane behind the south support post  
 +           * The display unit for the pressure at the pump has a needle indicator and is mounted under the focal plane on the south support post  
 +      * Ensure that the main valves on the gas bottles are open 
 +      * Ensure that the gas bottles are not empty 
 +           * The gas regulators are not normally adjusted.  They should all be set to provide a pressure around 20 psi. 
 +           * The bottle supplying the P-10 gas for the ion chamber is secured to the cross-brace of the south support for the focal plane chamber.  It has an electronic Ashcroft pressure gauge upstream of the regulator (toggle on and off with the “on/off” switch) and a mechanical pressure gauge downstream of the regulator.  
 +           * The bottle supplying CF4 (tetrafluoromethane) gas for the CRDCs is secured to the cross-brace of the south support for the focal plane chamber.  It has an electronic Ashcroft pressure gauge upstream of the regulator (toggle on and off with the “on/off” switch) and a mechanical pressure gauge downstream of the regulator.  
 +           * The bottle supplying isobutane (C4H10) for the CRDCs is secured to the south support post for the focal plane chamber.  It sits on a scale for monitoring the isobutane consumption – the electronic display for the scale sits on the chiller unit under the focal plane chamber.  It has a mechanical pressure gauge downstream of the regulator. (PICTURE GOES HERE) 
  
- In Data-U6 
- Ensure I265GV is closed to isolate focal plane vacuum chamber from the rest of the beamline 
- Confirm that the focal plane chamber is under vacuum 
- Confirm that the only open gas handling system valves are 4, 5, 6, 20, 21, and 22 
- In the S3 vault 
- Ensure that the gas handling system roughing pump is running and has a good vacuum 
- The pump sits on the floor under the focal plane behind the south support post (PICTURE GOES HERE) 
- The display unit for the pressure at the pump has a needle indicator and is mounted under the focal plane on the south support post (PICTURE GOES HERE)  
- Ensure that the main valves on the gas bottles are open 
- Ensure that the gas bottles are not empty 
- The gas regulators are not normally adjusted.  They should all be set to provide a pressure around 20 psi. 
- The bottle supplying the P-10 gas for the ion chamber is secured to the cross-brace of the south support for the focal plane chamber.  It has an electronic Ashcroft pressure gauge upstream of the regulator (toggle on and off with the “on/off” switch) and a mechanical pressure gauge downstream of the regulator. (PICTURE GOES HERE) 
- The bottle supplying CF4 (tetrafluoromethane) gas for the CRDCs is secured to the cross-brace of the south support for the focal plane chamber.  It has an electronic Ashcroft pressure gauge upstream of the regulator (toggle on and off with the “on/off” switch) and a mechanical pressure gauge downstream of the regulator. (PICTURE GOES HERE) 
- The bottle supplying isobutane (C4H10) for the CRDCs is secured to the south support post for the focal plane chamber.  It sits on a scale for monitoring the isobutane consumption – the electronic display for the scale sits on the chiller unit under the focal plane chamber.  It has a mechanical pressure gauge downstream of the regulator. (PICTURE GOES HERE) 
  
 Filling Ion Chamber with Gas Filling Ion Chamber with Gas
gas_handling_system.txt · Last modified: 2023/05/11 11:29 by pereira