Log entry time 13:31:06 on February 23, 2011

Entry number 348279

Followups:

• 348425 02/24/11 10:54 V. Sulkosky T1 Coincidence Window Width
• 348474 02/24/11 18:25 V. Sulkosky SRC N-efficiency Timing Information and setup II

Times to get from target to point at which EDTM is injected

 Electron into L-HRS: (3.114 GeV/c)

  87   TOF (26 m to s2m)
  60   Signal cable from PMT
 ---
 147 ns

 Proton into R-HRS:
 
 0.488 GeV/c
 -----------
 0.463  Beta 
 188   TOF  (26 m to s2m)
  60   Signal cable from PMT
 ---
 248 ns 

 Time difference between proton and electron signals to EDTM injection point:


    0.488 GeV/c (proton)
   ------------------------------
R-L = 101 ns

The edtm configuration for this is set to

./edtmsetup 0 112 232

which produces a delta-T between T1 and T3 = 76 ns, i.e, T1 comes after
T3, since the proton is slower.  To produce the desired delay between
the EDTM pulses for left and right arm, I added about 29 ns of delay
cable to the right arm EDTM pulse.  This was needed, since I can only 
delay up to 128 ns with the delay module.

I then adjusted the width of T3 and T1 as follows:

T3: from 208 ns to 55 ns
T1: from 82 ns to 176 ns

The T5 coincidence is formed with an overlap between T1 and T3.  The
electron (T3) was chosen to carry the T5 time.  To get a proper delay
with the EDTM pulses, I choose the following delay for T3:

./t3_delay 116

which places the T3 pulse inside of T1 by about 40 ns.

Before setting things up, I removed all delay to T1:

./t1_delay 0 0

I did not touch the delays of T6 and T7, since those were set awhile ago.