Difference between revisions of "D2n kinematics"
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| − | = | + | |
| + | = Run Plan (updated when needed) = | ||
| + | * [https://docs.google.com/spreadsheets/d/1NCFehy_w7i-dfH9_Mgn403ec1e-D3Kqb1D2_muhI8FM/edit?usp=sharing Draft d2n Run Plan] | ||
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| + | = Rough / High-level sketch of d2n kinematic settings = | ||
Reduced kinematics list to accommodate limited beam time (dropped 1/4 of kinematics) | Reduced kinematics list to accommodate limited beam time (dropped 1/4 of kinematics) | ||
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A 4.2 13.5 0.207 2.414 3.178 | A 4.2 13.5 0.207 2.414 3.178 | ||
B 4.2 16.4 0.305 3.554 2.993 | B 4.2 16.4 0.305 3.554 2.993 | ||
| − | C 4.0 20.0 0.418 5.018 2.806 | + | C 4.0 20.0 0.418 5.018 2.806 -- Only setting compatible with SOLID Cherenkov small-angle test. |
--------- SHMS ---------- | --------- SHMS ---------- | ||
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* '''Not shown is the 1-pass running''' (2'ish days) | * '''Not shown is the 1-pass running''' (2'ish days) | ||
| − | == | + | == Schedule Overview == |
* We should expect to have '''6 weeks of beam''' | * We should expect to have '''6 weeks of beam''' | ||
** Hall C will have priority over Hall A (if there are beam loading, machine stability issues) | ** Hall C will have priority over Hall A (if there are beam loading, machine stability issues) | ||
| Line 34: | Line 39: | ||
# Then move to kin A and Z (high-Q2 SHMS, small angle HMS) | # Then move to kin A and Z (high-Q2 SHMS, small angle HMS) | ||
# Scheduling of Kin B, Y and 1-pass running would depend on how the Accel/target/virus behaves | # Scheduling of Kin B, Y and 1-pass running would depend on how the Accel/target/virus behaves | ||
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== Non-production runs == | == Non-production runs == | ||
Revision as of 14:28, 21 May 2020
Run Plan (updated when needed)
Rough / High-level sketch of d2n kinematic settings
Reduced kinematics list to accommodate limited beam time (dropped 1/4 of kinematics)
--------- Beam Params ----------
E_beam = 10.4 GeV/c
I_beam = 30 uA
P_targ = 0.50
P_beam = 0.80
--------- HMS ----------
E' theta x Q2 W
A 4.2 13.5 0.207 2.414 3.178
B 4.2 16.4 0.305 3.554 2.993
C 4.0 20.0 0.418 5.018 2.806 -- Only setting compatible with SOLID Cherenkov small-angle test.
--------- SHMS ----------
E' theta x Q2 W
X 7.5 11.0 0.527 2.866 1.859
Y 6.4 14.5 0.565 4.240 2.036
Z 5.6 18.0 0.633 5.701 2.046
- Not shown is the 1-pass running (2'ish days)
Schedule Overview
- We should expect to have 6 weeks of beam
- Hall C will have priority over Hall A (if there are beam loading, machine stability issues)
- Rough priorities:
We plan to start at 5-pass with kinematics A and X (small angle)- We will start at 5-pass with kinematics C and X (small angle on SHMS, large angle on HMS)
- This will allow the SOLID Cerenkov prototype folks to setup before beam and run their small-angle test on the HMS side.
- Then move to kin A and Z (high-Q2 SHMS, small angle HMS)
- Scheduling of Kin B, Y and 1-pass running would depend on how the Accel/target/virus behaves
Non-production runs
- Confirm we have all the optics we need!
- Analyze and get the new matrices in the analyzer
- Make sure we have empty target runs for all kinematics and all optics configurations to help disentangle beamline window contributions
- Nail down estimates for ref cell running (N2, H2, 3He, empty)
- Minimal/no positron running?
- Perhaps measure the positron background in HMS at 20 degree and compare with model?
