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gas_handling_system [2018/04/11 16:11] pereira [In Data-U6] |
gas_handling_system [2019/09/24 07:43] pereira [General Information for focal-plane gas handling system] |
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====== Detector gas handling system ====== | ====== Detector gas handling system ====== | ||
- | * [[#General information]] | + | * [[#General information |
- | * [[#LabView Control Program]] | + | * [[#LabView Control Program |
- | * [[#Preparation of Gas bottles|Preparation of Gas bottles for filling of detectors]] | + | * [[# |
* [[#Filling Ion Chamber with Gas]] | * [[#Filling Ion Chamber with Gas]] | ||
* [[#Filling CRDC1 and CRDC2 with Gas]] | * [[#Filling CRDC1 and CRDC2 with Gas]] | ||
* [[#Removing Gas from Focal Plane Detectors]] | * [[#Removing Gas from Focal Plane Detectors]] | ||
+ | * [[Venting/ | ||
* [[#Tracking Gas bottles pressures|Tracking Gas bottles pressures from Barney]] | * [[#Tracking Gas bottles pressures|Tracking Gas bottles pressures from Barney]] | ||
* [[# | * [[# | ||
- | ===== General Information ===== | + | ===== General Information |
+ | The gas handling systems for both Focal Plane gas-filled detectors – the [[Detectors# | ||
+ | |||
+ | The Labview software communicates with a MKS gas handling system through a Moax Nport 5110 terminal server attached to the bottom of the focal-plane chamber. This terminal server has a hostname s800ghts.nscl.msu.edu, | ||
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+ | Note that since the same roughing pump drives the gas handling systems for both gas-filled detectors, extra precautions must be taken to protect one detector from the pressure of the other detector. The fact that the same pump drives both systems is not indicated on the graphics for the LabView control application | ||
Required controls and monitoring | Required controls and monitoring | ||
* LabView gas handling system application **FPGHS_TCPIP-II.vi** | * LabView gas handling system application **FPGHS_TCPIP-II.vi** | ||
* PanelMate **S800vac.ui page 07**: Focal Plane Detector | * PanelMate **S800vac.ui page 07**: Focal Plane Detector | ||
- | The gas handling systems | + | ===== LabView Control Program |
+ | To start the gas handling system control application, | ||
- | Note that since the same roughing pump drives | + | * The LabView program controls |
+ | * Go to Initialization tab | ||
+ | * Confirm | ||
- | ===== LabView Control Program ===== | ||
- | To start the gas handling system control application, | ||
* 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 " | + | * Use the number of the current experiment (or the date) as the name of the log file and save in the default directory **/projects/s800/Gas logs** |
* 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 | ||
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- | ===== Preparation of Gas bottles ===== | + | ===== Preparation of Gas bottles |
==== In Data-U6 ==== | ==== In Data-U6 ==== | ||
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* Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system | * Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system | ||
- | * Close **valve 6** | + | * Close **valves |
* Open **valve 2**; the flow reading at MFC #1 should jump momentarily | * Open **valve 2**; the flow reading at MFC #1 should jump momentarily | ||
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* Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system | * Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system | ||
- | * Close **valve 22** | + | * Close **valves |
* Open **valves 10 and 15** | * Open **valves 10 and 15** | ||
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* Open **valves 5 and 21** | * Open **valves 5 and 21** | ||
- | * **IMPORTANT:** CLOSE **VALVE 25** to protect CRDCs from Ion Chamber pressure | + | * **IMPORTANT**: Before opening valve 8 (next step), |
* Empty Ion Chamber to a pressure at or below the pressure of the CRDCs | * Empty Ion Chamber to a pressure at or below the pressure of the CRDCs | ||
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* Close **valves 8 and 24** | * Close **valves 8 and 24** | ||
- | * Open **valves 6 and 22** | + | * Open **valves 6, 7, 22 and 23** |
* Enter S3 vault and close valves downstream of regulators in [[# | * Enter S3 vault and close valves downstream of regulators in [[# |