Thursday, February 10; 1:30pm - 2:30pm

attendees: Matt Bellis, Aidan Kelleher, Ameya Kolarkar, Bodo Reitz, 
           Seamus Riordan, Andrei Semenov, Neil Thompson, Lingyan Zhu


Only topic: anlysis plan for the N20 tests from Feb 1, 2005

the ultimate questions:

- time resolution:
  TOF target - neutron array       (momentum resolution)
  Time.Diff. Left and Right PMTs   (position resolution)
  TOF target - Veto                (PID performance)

- efficiency:
  - neutron detection in array
  - neutron detection in veto
  - proton detection in array
  - proton detection in veto
  - nothing/other in veto/array

- rates


to extract this information:

book-keeping                               Matt Bellis (MB), Aidan Kelleher (AMK)
- list of all runs
- enter all runs into db_run.dat
  (including settings)


rate-studies:
- establish scaler-map
- study scaler rates on (all available) PMTs 
  as function of target/beam current
- study rates on all PMTs based on multihit TDCs
  as function of target/beam current                     Ameya Kolarkar (AK)
- compare against simulation of background rates         Lingyan Zhu    (LZ) will do
  (from Pavel / Andrei / Irina )                         the simulation

- coinc rates of protons/neutrons                        TBD
  (do we have enough statistics)

HRS-database
- check database of HRS for correctness                  AMK    
- optimize timing of S1 and S2m                          AMK
- optimize gain of cherenkov / pion rejector             AMK + NT
  for PID 
HRS-analyzer
- develop physics module for analyzer predicting         NT
  momentum of proton/neutron towards the N20 array

N20-database
- check geometry of setup                                Seamus Riordan (SR)
- check detector map                                     SR
- gain matching                                          NT
- timing offsets                                         NT

N20-analysis
- typical multiplicities in veto / in planes 1-5         AK
- definition of hits/clusters/tracks                     TBD
- position of track/cluster/hit in veto / nd             TBD
- resolution of position reconstruction                  TBD
- efficiency of position reconstruction                  TBD
- time of arrival / time of flight                       TBD
- PID (define cuts)                                      TBD
  * signal veto vs signal in nd (time and space)   
- total energy deposition                                TBD

Coinc-analysis:
- proton/neutron detection efficiencies in nd / veto     TBD
- for all but the 1H(e,e'p) MCeep simulations will be    Bodo Reitz (BR)
  needed

Misc:

use ifarm machines and:

/work/halla/e02-013/disk1
/work/halla/e02-013/disk2

let me (BR) know, if you dont have access.

SR will send out a write-up about how to install the root-analyzer
and the gen library from CVS.
SR will install and manage an uptodate version plus the official 
database direcory on our workdisk.

Andrei Semenov (AS) will provide additional simulations of 
the neutron detector, if needed.