Winter 2016 optic plans
Back to [Winter2016 DVCS run plan]
If you have questions call Julie Roche, Number is on white board
Integration with RHRS plan
LHRS step | RHRS step | Approximate beam time | Goals |
L1 (sieve) | R1 (sieve) | 14h | 20 uA DIS with sieve slit on optics foils, single carbon and LH2 |
L2 (sieve) | 3h | Delta Elastic on LH2, 1 uA | |
L3 (no sieve) | 3h | Elastic on carbon (Needs A. Camsonne as sieve operator) | |
L1 (sieve) | R1 (sieve) | 8h | 20 uA DIS with sieve slit on 4 cm dummy (Needs A. Camsonne as sieve operator) |
R2 (no sieve) | 3h | Delta Elastic on LH2, 20 uA | |
R3 (no sieve) | 1h | Elastic dummy | |
R4 (no sieve) | 1h | DIS on dummy and optics | |
L4 (sieve) | R5 (no sieve) | 1h | Tungsten wire (Needs D. Mekins as wire operator) |
One pass program
Ebeam= 2.301 GeV
LHRS θe=16.5 deg
LHRS DAQ: S2+Cer (T3), Use LHRNEW for DAQ configuration. See [section 5.2 in DVCS shift howto] for complete procedure!.
Energy and position lock should be on.
The DVCS calorimeter HVs need to be off
==== Step L1: Procedure with Sieve-slit (DIS) ====
This part of the program is to be run in parallel with the RHRS run plan with sieve slit (Step R1)
The DVCS calorimeter HVs need to be off
P0= 1.0 [GeV/c] (DIS)
If the LHRS goes to a new higher momentum setting, Q2 and Q3 need to
be cycled.
Q2= 0.19 GeV2
W=1.77 GeV
LEFT Q1 Current | Q1 | Estimated Rates | estimated time | actual rates | run number | #event in the run | |
Target | [A] | detune | [Hz] at 20 uA | [Hz] at 20 uA | |||
Optics no raster |
752.0 | 1.000 | 300 | 1h (or at least 100k events) | |||
Optics | 643.7 | 0.856 | 300 | 1h (or at least 100k events) | |||
Optics | 559.5 | 0.744 | 300 | 1h (or at least 100k events) | |||
Optics | 470.0 | 0.625 | 300 | 1h (or at least 100k events) | |||
4 cm Dummy 1 by 1 raster |
752.0 | 1.000 | 160 | 45min (or at least 45k events) | |||
4 cm Dummy | 643.7 | 0.856 | 160 | 45min (or at least 45k events) | |||
4 cm Dummy | 559.5 | 0.744 | 160 | 45min (or at least 45k events) | |||
4 cm Dummy | 470.0 | 0.625 | 160 | 45min (or at least 45k events) | |||
C single foils no raster |
752.0 | 1.000 | 60 | 20 min (or at least 72k) | |||
C single foils | 643.7 | 0.856 | 60 | 20 min (or at least 72k) | |||
C single foils | 559.5 | 0.744 | 60 | 20 min (or at least 72k) | |||
C single foils | 470.0 | 0.625 | 60 | 20 min (or at least 72k) | |||
15 cm LH2 2 by 2 raster |
752.0 | 1.000 | 780 | 20 min (or at least 72k) | |||
15 cm LH2 | 643.7 | 0.856 | 780 | 20 min (or at least 72k) | |||
15 cm LH2 | 559.5 | 0.744 | 780 | 20 min (or at least 72k) | |||
15 cm LH2 | 470.0 | 0.625 | 780 | 20 min (or at least 72k) | |||
==== Step L2: Delta Scan with Proton Elastic (sieve) ====
The DVCS calorimeter HVs need to be off
If the LHRS goes to a higher momentum setting, Q2 and Q3 need to
be cycled.
LHRS θe=16.5 deg
Rate: 13.3 kHz at 20 μA (taking into account the sieve). Electron rates only.
We are going to need to take these data at about 1 μA.
Run duration about 10 minutes each (we want at least 10k events).
Target: 15cm LH2 | |||||
k' [GeV] | LQ1 Current [A] | Q1 detune | Delta P [%] | run number | number of trigger |
2.184 | 1642.4 | 1 | 1.04 | ||
2.184 | 1405.9 | 0.856 | 1.04 | ||
2.184 | 1221.9 | 0.744 | 1.04 | ||
2.184 | 1026.5 | 0.625 | 1.04 | ||
2.142 | 1610.8 | 1 | 1.02 | ||
2.142 | 1378.8 | 0.856 | 1.02 | ||
2.142 | 1198.4 | 0.744 | 1.02 | ||
2.142 | 1006.7 | 0.625 | 1.02 | ||
2.100 | 1579.2 | 1 | 1.00 | ||
2.100 | 1351.8 | 0.856 | 1.00 | ||
2.100 | 1174.9 | 0.744 | 1.00 | ||
2.100 | 987.0 | 0.625 | 1.00 | ||
2.058 | 1547.6 | 1 | 0.98 | ||
2.058 | 1324.8 | 0.856 | 0.98 | ||
2.058 | 1151.4 | 0.744 | 0.98 | ||
2.058 | 967.3 | 0.625 | 0.98 | ||
2.016 | 1516.0 | 1 | 0.96 | ||
2.016 | 1297.7 | 0.856 | 0.96 | ||
2.016 | 1127.9 | 0.744 | 0.96 | ||
2.016 | 947.5 | 0.625 | 0.96 |
==== Step L3: Carbon elastic ( no sieve) ====
A. Camsonne needs to be called to remove the sieve at the beginning to the program.
The DVCS calorimeter HVs need to be off
If the LHRS goes to a higher momentum setting, Q2 and Q3 need to
be cycled.
P0= 2.281 [GeV/c] (super-elastic)
Estimated rate: 0.7 Hz at 20 μ
Single Carbon foil or Optics target.
No raster
3 hours.
==== Step L4: Tungsten wire ====
This part of the program is to be run in parallel with the RHRS run plan (Step R5)
The DVCS calorimeter HVs need to be off
If the LHRS goes to a new higher momentum setting, Q2 and Q3 need to
be cycled.
k' [GeV] | LQ1 Current [A] | Q1 detune | Delta P [%] | run number | number of trigger |
Target: Carbon single foil | |||||
1 | 752 | 1.00 | n/A (DIS) | ||
Tungsten wire | |||||
1 | 752 | 1.00 | n/A (DIS) |
Two passes program
Ebeam= 4.557 GeV, negative polarity
LHRS θe=38.04 deg
LHRS DAQ: S2+Cer (T3), Use LHRNEW for DAQ configuration. See [section 5.2 in DVCS shift howto] for complete procedure!.
- Optics target
When going up in momentum, Q2 and Q3 need to be cycled, Q1 doesn't need to be cycled.
Set p0=1 GeV. Q2, Q3 and the dipole need to be momentum regulated. Take Q1 off the regulation.
5 optics foils target.
5 u A unrastered (if the rates are too high use rescales or decrease the current). Take 100 k events at :- Q1= 1672.4 A (tuned)
- Q1= 1605.5 A (96%)
- Q1= 1455.0 A (87%)
- Q1= 1254.3 A (75%)
- Q1= 1087.1 A (65%)
- Delta Scan
When going up in momentum, Q2 and Q3 need to be cycled, Q1 doesn't need to be cycled.
Set p0=2.224 GeV. Q2, Q3 and the dipole need to be momentum regulated. Take Q1 off the regulation.
20 uA rastered.
I expect about 100 Hz at 20 uA.delta p0 [GeV] Q1 detune Q1 current (A) 1.04 2.313 1 1739.3 1.04 2.313 0.96 1669.8 1.04 2.313 0.87 1513.2 1.04 2.313 0.75 1304.5 1.04 2.313 0.67 1165.4 1.02 2.268 1 1705.9 1.02 2.268 0.96 1637.7 1.02 2.268 0.87 1484.1 1.02 2.268 0.75 1279.4 1.02 2.268 0.67 1143.0 1 2.224 1 1672.4 1 2.224 0.96 1605.6 1 2.224 0.87 1455.0 1 2.224 0.75 1254.3 1 2.224 0.67 1120.5 0.98 2.180 1 1639.0 0.98 2.180 0.96 1573.4 0.98 2.180 0.87 1425.9 0.98 2.180 0.75 1229.2 0.98 2.180 0.67 1098.1 0.96 2.135 1 1605.6 0.96 2.135 0.96 1541.3 0.96 2.135 0.87 1396.8 0.96 2.135 0.75 1204.2 0.96 2.135 0.67 1075.7