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gas_handling_system [2013/12/26 14:43] pereira [In the S3 vault] |
gas_handling_system [2013/12/26 14:48] pereira [In Data-U6] |
* Confirm that the focal plane chamber is under vacuum | * 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** | * Confirm that the only open gas handling system valves are **4, 5, 6, 20, 21, and 22** |
| * (Check section on [[vacuum controller|vacuum control]] for further details.) |
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==== In the S3 vault ==== | ==== In the S3 vault ==== |
* Ensure that the gas bottles are not empty | * 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 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 the P-10 gas for the [[Detectors#Ionization Chamber|ionization 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 CF<sub>4</sub> (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 CF<sub>4</sub> (tetrafluoromethane) gas for the [[Detectors#Cathode Readout Drift Chambers (CRDC)|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 (C<sub>4</sub>H<sub>10</sub>) 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. | * The bottle supplying isobutane (C<sub>4</sub>H<sub>10</sub>) for the [[Detectors#Cathode Readout Drift Chambers (CRDC)|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. |
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{{:wiki:gas-bottle3.jpg?300}} | {{:wiki:gas-bottle3.jpg?300}} |