Difference between revisions of "Turn FDC ON"
From Hall D Ops Wiki
(Created page with "== Procedure for turning on the FDC after beam alignment == This is a procedure to be followed when the photon beam has been aligned and we want to apply HV on the chambers. ...") |
(→Procedure for turning on the FDC after beam alignment) |
||
| Line 1: | Line 1: | ||
| − | == | + | == Standard procedure for turning on the FDC after beam alignment == |
This is a procedure to be followed when the photon beam has been aligned and we want to apply HV on the chambers. There is no need to follow this procedure once the beam has been established and the HV settings adjusted. | This is a procedure to be followed when the photon beam has been aligned and we want to apply HV on the chambers. There is no need to follow this procedure once the beam has been established and the HV settings adjusted. | ||
| Line 5: | Line 5: | ||
# Find the FDC HV & LV control window, or start a new one following the instructions here. | # Find the FDC HV & LV control window, or start a new one following the instructions here. | ||
# Turn on all the LV (if it is not on yet): left click on the "ALL LV" icon and chose "FDC: Turn ON LV Channels". | # Turn on all the LV (if it is not on yet): left click on the "ALL LV" icon and chose "FDC: Turn ON LV Channels". | ||
| − | # For each | + | # Turn on all the '''negative''' HV: left click on the "ALL HV" icon and chose "FDC: Turn ON ALL HV- Channels". Wait till all "HV-" buttons are green. In case some of the HV- channels trip, click twice on the corresponding HV- button, once to a acknowledge the trip and second to turn on HV again. |
| − | #* Click on the | + | # For each package at the left panel, FDC1 ... FDC4, and each cell within the package, Cell 1 ... Cell 6, do the following '''one cell at a time''', starting from (FDC 1,cell 1): |
| + | #* Click on the first and fourth (outer) HV+ sectors and wait till the buttons are green which may take several minutes. Monitor the currents on the corresponding channels: the bottom histogram. If the currents exceed the trip level the channel will trip. Then click on the corresponding HV+ channels twice, once to a acknowledge the trip and second to turn on HV again. | ||
Revision as of 10:56, 2 September 2014
Standard procedure for turning on the FDC after beam alignment
This is a procedure to be followed when the photon beam has been aligned and we want to apply HV on the chambers. There is no need to follow this procedure once the beam has been established and the HV settings adjusted.
- Find the FDC HV & LV control window, or start a new one following the instructions here.
- Turn on all the LV (if it is not on yet): left click on the "ALL LV" icon and chose "FDC: Turn ON LV Channels".
- Turn on all the negative HV: left click on the "ALL HV" icon and chose "FDC: Turn ON ALL HV- Channels". Wait till all "HV-" buttons are green. In case some of the HV- channels trip, click twice on the corresponding HV- button, once to a acknowledge the trip and second to turn on HV again.
- For each package at the left panel, FDC1 ... FDC4, and each cell within the package, Cell 1 ... Cell 6, do the following one cell at a time, starting from (FDC 1,cell 1):
- Click on the first and fourth (outer) HV+ sectors and wait till the buttons are green which may take several minutes. Monitor the currents on the corresponding channels: the bottom histogram. If the currents exceed the trip level the channel will trip. Then click on the corresponding HV+ channels twice, once to a acknowledge the trip and second to turn on HV again.
