October 17, 2007 online meeting minutes: Difference between revisions

Revision as of 13:02, 19 October 2007

present: Sergey Boyarinov, Eugene Pasyuk, Benjamin Raydo, Sergey Pozdnyakov, Stepan Stepanyan, Nerses Gevorgyan, David Jenkins, Chris Cuevas

DVCS Trigger

Ben presented recent results obtain by processing DVCS raw data through trigger system simulation tools; we discussed several approaches to the trigger based on production and calibration run requirements; based on that discussion the number of changes will be applied to the 'DVCS Trigger System Requirements' document, most important listed below

for 'calibration run' (search for pi0, 2 clusters with relatively low threshold, for example Ben measured 88% efficiency with threshold=50 and requiring minimum 3 cristals in the cluster) efficiency can be about 90%

for production: one cluster with hodoscope on separate trigger bit (make sure latch is working, although electron will go to one of them, CLAS or DVCS), we are expecting powerful hits (3+ hits)

hodoscope: 3x3 tower size, match will be enforced by overlaping; overlaping area can be another parameter

G9-FROST preparations

We discussed what should be done before G9A run start. Following issues came up:

Franz implemented new monitoring features into fast online reconstruction; Sergey will talk to Franz to see what should be done to make sure it works

we'll conduct counting house cleanup (remove rack, clean table, exsess old equipment)

we asked Volker to deal with Universal Voltronics, the company which does Lecroy mainframe repair; we are not happy with both repair quality and schedule; it maybe necessary to involve procurement division

Nerses labeled all HV mainframes in the Hall; need to make a list for shift takers, which mf correcponds to which ioc etc

Chris will check L2 electronics and DC TDC stop signal pulsers, especially on SF south side where missing gates were observed in dc3, dc4, dc9 and dc10

epics_monitor switched from CDEV to CA by Sergey, former gamma_monitor incorporated into it, everything is driven by config files in $CLON_PARMS/epics/ area, looks good but have to make sure all output are Ok; Eugene is looking into the set of EPICS channels in those config files making sure all channel names are correct

work in progress to implement IOC resets/heartbeats for new LAC ioc and Linux-based ioc's; it will be done for tagger_mac as well

@@ Line 4: / Line 4: @@
 '''DVCS Trigger'''
-* Ben presented recent results obtain by processing DVCS raw data through trigger system simulation, presentation slides can be found [here]
+* Ben presented [http://clonweb/wiki/clondocs/DVCS_Trigger/dvcs_047213_trigger_efficiency_oct17.xls recent results] obtain by processing DVCS raw data through trigger system simulation tools; we discussed several approaches to the trigger based on production and calibration run requirements; based on that discussion the number of changes will be applied to the 'DVCS Trigger System Requirements' document, most important listed below
-* we want for '''calibration''': pi0  (2 clusters, 3x50=88%), efficiency above 90%; for '''production''': one cluster with hodoscope on separate trigger bit (make sure latch is working, although electron will go to one of them, CLAS or DVCS), we are expecting powerful hits (3+ hits)
+* for '''calibration'' run' (search for pi0, 2 clusters with relatively low threshold, for example Ben measured 88% efficiency with threshold=50 and requiring minimum 3 cristals in the cluster) efficiency can be about 90%
+* for '''production''': one cluster with hodoscope on separate trigger bit (make sure latch is working, although electron will go to one of them, CLAS or DVCS), we are expecting powerful hits (3+ hits)
 * we have to set threshold low because of TDCs