DVCS Trigger System

Current section contains DVCS Calorimeter Trigger System development materials.

Project in progress

First approach to System Requirements (September 2007) (PowerPoint, HTML).

Ben's presentation on CLON meeting 3-Oct-2007: preliminary design.

Ben's first approach to the DVCS Cluster finding 8-Oct-2007.

Sergey, Rustam (Oct-9-2007 through Oct-16-2007):

Calibration data: 10000 events ascii file generated from dvcs_047213.A00. Pedestals were used as for the run 46595 with
the beam current=20 nA (presented on this plot).

Calibration data subset: About 3200 events ascii file contains pi0 events only. That file can be considered as a sample
of 'good' events, trigger system should pass all of them.

Production data: 10000 events ascii file generated from clas_047210.A01 using pedestals for run 46595.
ASCII file containing all 'good' events from the same datafile (actually all events from so-called
skim file egg_47210_pass1_a01.bos).

Ben's presentation on CLON meeting 10-Oct-2007: Cluster Finding.

Ben's observations on DVCS data processing 10-Oct-2007.

Ben's preliminary results on DVCS Trigger efficiency studies 11-Oct-2007.

Useful documentation

CAEN V895 Discriminator Manual Revision 2, September 2002, pdf.

CAEN V1495 Logic Unit Manual Revision 4, January 2007, pdf.

V1495-related software downloaded from CAEN site on September 25, 2007 (check CAEN for newer versions !):

• V1495 DEMO USER FPGA Firmware

• V1495 VME FPGA Firmware

• Quartus2 Project

• Firmware upgrade tool (Windows executable file

• V1495 Firmware Upgrade Tool (source code and VC++ project)

Our materials:

• CLAS version of V1495 Firmware Upgrade Program - CAEN version slightly modified by Sergey Boyarinov, see usage example inside; runs from VxWorks prompt