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installation_fp_sci [2023/02/17 20:09] pereira [Pumpdown of FP Chamber] |
installation_fp_sci [2023/03/07 08:36] pereira [Filling & Running FP Gaseous Detectors] |
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- Once the FPG bottoms out, check the box next to “Valve Controls”, | - Once the FPG bottoms out, check the box next to “Valve Controls”, | ||
- If the system will only be vented for a short time, leave the TMP on, otherwise turn it off. | - If the system will only be vented for a short time, leave the TMP on, otherwise turn it off. | ||
- | - Plot PT1, PT2, and PT3 from the “GHS_FP_Main” page as well as BPG from the “D2686 Pumping Station” page on the same axis. | + | - Plot PT1 (S800_GHS: |
- Briefly (~2 seconds) open the vent valve by clicking **Open** next to the valve labeled “Vent” then click **Close**. Check that all the pressures are increasing at the same rate. | - Briefly (~2 seconds) open the vent valve by clicking **Open** next to the valve labeled “Vent” then click **Close**. Check that all the pressures are increasing at the same rate. | ||
- Again, open the vent valve and observe the pressure for 30 seconds to ensure the pressures are increasing at the same rate among all four gauges. If a difference of > 1 Torr is observed between any two gauges, click **Close** on the vent valve. | - Again, open the vent valve and observe the pressure for 30 seconds to ensure the pressures are increasing at the same rate among all four gauges. If a difference of > 1 Torr is observed between any two gauges, click **Close** on the vent valve. | ||
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- Open “Focal Plane Pumping Station” page from FRIB EXP Main → S800 → Vacuum Main (Primary Pages). | - Open “Focal Plane Pumping Station” page from FRIB EXP Main → S800 → Vacuum Main (Primary Pages). | ||
- Open “GHS_FP_Main” and “FP_State_Buttons” pages from FRIB EXP Main → S800 → GHS Pages (Secondary Pages). | - Open “GHS_FP_Main” and “FP_State_Buttons” pages from FRIB EXP Main → S800 → GHS Pages (Secondary Pages). | ||
- | - Plot PT1, PT2, and PT3 from the “GHS_FP_Main” page as well as BPG from the “D2686 Pumping Station” page on the same axis. | + | - Plot PT1 (S800_GHS: |
- On the “FP_State_Buttons” page change from “Vent” mode to “Pump” mode by clicking **PUMP** in both the D2703 and D2708 tabs. | - On the “FP_State_Buttons” page change from “Vent” mode to “Pump” mode by clicking **PUMP** in both the D2703 and D2708 tabs. | ||
- Check the box next to “Valve Controls” on the “D2686 Pumping Station” page. | - Check the box next to “Valve Controls” on the “D2686 Pumping Station” page. | ||
- If the TMP is off and Foreline Valve (FV) is closed, open the Roughing Valve (RV) briefly (2 seconds) by clicking **Open** and observe the behavior of the pressure gauges. If they all decrease at the same rate, again click **Open** to begin rouging out the chambers. | - If the TMP is off and Foreline Valve (FV) is closed, open the Roughing Valve (RV) briefly (2 seconds) by clicking **Open** and observe the behavior of the pressure gauges. If they all decrease at the same rate, again click **Open** to begin rouging out the chambers. | ||
- | - If the TMP is still on (this could be the case for a short vent period), | + | - If the TMP is still on (this could be the case for a short vent period), |
- | - When the BPG reads zero, **Close** RV and **Open** FV. Turn the TMP on if it is not already. When the TMP is “at speed” **Open** the TGV. If the TMP was off before | + | - When the BPG reads below 200 mTorr, **Close** RV and **Open** FV. Turn the TMP on if it is not already. When the TMP is “at speed” |
+ | - NOTE: before | ||
- Allow the TMP to pump on the system until the IG reads < 1E-5 Torr. | - Allow the TMP to pump on the system until the IG reads < 1E-5 Torr. | ||
- On the “FP_State_Buttons” page click **RUN** to enter run mode. | - On the “FP_State_Buttons” page click **RUN** to enter run mode. | ||
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===== Filling & Running FP Gaseous Detectors ===== | ===== Filling & Running FP Gaseous Detectors ===== | ||
- | - Plot PT1, PT2, and the control valves for both D2703 (CRDC) and D2708 (IC). | + | - Plot PT1 (S800_GHS: |
- Click **Enable Controls** for the CRDC and IC “Control Valve PID”s, then click **ENABLE** to turn on PID controls for each vessel. Each control valve should adjust to its BASE value. | - Click **Enable Controls** for the CRDC and IC “Control Valve PID”s, then click **ENABLE** to turn on PID controls for each vessel. Each control valve should adjust to its BASE value. | ||
- If the CRDC valve remains completely open (stuck at 100%), open a probe with PV: “S800_GHS: | - If the CRDC valve remains completely open (stuck at 100%), open a probe with PV: “S800_GHS: |