Differences

This shows you the differences between two versions of the page.

--- task:sdt [2025/06/12 16:24] – ryans
+++ task:sdt [2025/10/09 18:39] (current) – painter
@@ Line 6: / Line 6: @@
   - **Setting the DCCT** On the DCCT's page found through the Diagnostics Launcher, under Hardware Overviews, there will be the DCCT at the bottom with the PV [FS_F1S1:DCCT_D1064]. You can follow this link, as the steps to set the DCCT are listed here [https://wikihost.frib.msu.edu/friboperators/doku.php?id=task:dcct_config]
   - **Configure BCM_5521 to based on new Primary Beam Power Limit.** After the FS group has made their hourlog post, they may have updated the Primary Beam Power Limit(this is found also on the Target Hall/ARIS status page, just under the setting you verify from before.) Operators will need to take the new power limit and plug it into the physics caluclator, where the BCM info is. Take the new value, and go to the Diag TCT Overview page and find [BDS_FFS:BCM_D5789] and plug in the new value. {{:task:diag_tct_bcm_5521.png?800}}
+During this time, the FS group may want to a very low beam current reading, usually around 1 nA to a few pA's. When they want this, it'll be best to put beam on FC1102. Switch to the Tetram setting and make sure that the range is set to 1.2 nA. Read the current on the cup and make adjustments to achieve the current reading they desire; this can be done with attenuators to get you in the ball park and the source slits to get more precise. A good practice to try at such a low reading is when you get to where you want the reading to be, insert FC0998. This will take beam off of 1102 and give you a chance to see if the reading that you are getting is from noise or is actually accurate.
+*Side note: If attempting very low beam current, pico range, and cup is not reading or is stagnant, open the 1102 Tetram page. Under the Control section, where Acquire is, click Done, then go back to Acquire. This should reset the cup and get a reading again.
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