Specifications for Database Additions for NLCTA/8Pack Structure Summary Display

Janice Nelson

9 March 2004

New PVs needed for Summary Display and possible names

1. Run Time showing how long since each of the Stations’ fault counters was reset in hours (now – then) to 2 decimal places. 10 sec updates are good.
TRS(1,2,8):AS:FLT:RUNTIME

2. Trip rate (faults/hr) for each of 8 structures: TRS1:AS1 and AS2, TRS2:AS1 and AS2, and TRS8:AS5, AS6, AS7, and AS8 defined as # of missing energy faults (since last reset) divided by the run time for that structure’s station (hrs since last reset above).
10 second updates is good.
Current PV names for # of missing energy faults are:
TRS(1,2):AS:FAULT:COUNT.(G,I) (I’m not sure how Ron will configure 8-pack’s loop.)
Name maybe TRS(1,2,8):ASn:FAULT:COUNTRATE ?

3. Gradient (MV/m) for each of the 8 structures. Equation is:

Where VTOP is from the peakpower meter, Pcal is a user enterable calibration constant, Pn is user enterable power at a given gradient, n is that gradient (also user enterable), and Eacc is the gradient we want to calculate. We’ll need 8 each: Pcal, Pn and n. Corresponding VTOPS are:
TRS1:AS1 & AS2 – TRS1:SLEDOUT:PEAKPWR:VTOP
TRS2:AS1 & AS2 – TRS2:SLEDOUT:PEAKPWR:VTOP
TRS8:AS5, 6 7 & 8 – TRS8: PPM2C1:PEAKPWR:VTOP
Updates every 10 seconds is good.
Name possibilities:
TRS(1,2,8):ASn:GRAD:PCAL, :PGRAD, :NGRAD with answer going into :EACC

4. Total energy gain in MeV – sum of the 8 gradients (EACCs) times 0.6 (the length of the structures in meters) Final answer into TRS:AS:GRAD:EACC? (For several months now we’ve had only 60 cm structures installed which is the planned length for NLC structures. Given this, it doesn’t seem necessary to have a variable (8 total) for each structure’s length.)

5. Average Gradient (MV/m) PV from #4 (TRS:AS:GRAD:EACC) divided by 8 (number of structures) TRS:AS:GRAD:EACCAVE ? (Need to differentiate average from total.)

6. Average trips: sum of the 8 missing energy trip fault counts divided by 8 (TRS:AS:FAULT:COUNT)

7. Average rate: average of the 8 rates (purple) (TRS:AS:FAULT:COUNTRATE)

8. Text PVs for each structure’s name. Can’t imagine needing anymore than 20 characters for each. (TRS(1,2,8):AS(1,2,5,6,7,8):STRUCT:NAME – 8 total)

Notes:

My best-guess total new PV count: 31

Time needed: it would be nice to watch it for a few weeks before the ITRP committee come, about April 5^th, to make sure it’s all that we need and give Janice time to modify the display to meet everyone’s requests.

Lower priority:

CUD – not too hard, Janice has to convert DM to dm2k.

WEB? Has to be displayed in foreground (and constant size) on the same monitor all the time. (Jingchen)