Difference between revisions of "More information can be found here"
(→Current (optimized) matrices) |
|||
| (15 intermediate revisions by the same user not shown) | |||
| Line 5: | Line 5: | ||
The following are the matrices that we used during the online analysis of the experiment: | The following are the matrices that we used during the online analysis of the experiment: | ||
| − | + | '''[1] LHRS default matrix - I cannot find this file. Might be able to retrieve it from github, but it would only be here for legacy reasons.''' | |
| − | [ | + | '''[2] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/RHRS_default_optics.html RHRS default matrix]''' |
= Optimization steps = | = Optimization steps = | ||
| Line 15: | Line 15: | ||
The following is the LHRS matrix optimized by GMp | The following is the LHRS matrix optimized by GMp | ||
| − | [3] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/LHRS_GMp_optics.html LHRS GMp optimization] | + | '''[3] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/LHRS_GMp_optics.html LHRS GMp optimization]''' |
The following is an optimization that Shujie did on the GMp LHRS matrix [3] | The following is an optimization that Shujie did on the GMp LHRS matrix [3] | ||
using the standard procedure for optimizing the angles | using the standard procedure for optimizing the angles | ||
| − | and the sieve runs taken during MARATHON | + | and the [https://wiki.jlab.org/tegwiki/index.php/Spring_2018_Optics_Runs sieve runs taken during MARATHON]. |
| − | [ | + | '''[4] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/LHRS_shujie_angle_optim.html LHRS re-optimization by Shujie]''' |
| + | |||
| + | [https://hallaweb.jlab.org/wiki/images/c/c8/Optics_Calibration_for_ep_%28Round_1%29.pdf Details on Shujie's optimization here] | ||
=== RHRS === | === RHRS === | ||
| Line 27: | Line 29: | ||
The following is the RHRS matrix optimized by GMp | The following is the RHRS matrix optimized by GMp | ||
| − | [5] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/RHRS_GMp_optics.html RHRS GMp optimization] | + | '''[5] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/RHRS_GMp_optics.html RHRS GMp optimization]''' |
= Current (optimized) matrices = | = Current (optimized) matrices = | ||
| Line 41: | Line 43: | ||
D 1 0 0 4.932426E-03 2.633700E-01 1.096600E-02 -7.253300E-02 | D 1 0 0 4.932426E-03 2.633700E-01 1.096600E-02 -7.253300E-02 | ||
| − | This is the coefficient that relates delta with theta | + | This is the coefficient that relates delta with theta x' fp linearly. We did this to get rid of a slope we saw in Emiss vs. xptar. |
| − | [6] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/LHRS_current_optics.html current LHRS matrix] | + | [[Image:Screen Shot 2018-07-27 at 11.27.02 AM.png|500px|center]] |
| + | |||
| + | '''[6] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/LHRS_slope_fixed.html matrix with Emiss vs. xptar slope fixed]''' | ||
| + | |||
| + | Last but not least, the term Y 0 0 0 2.670000E-03 was introduced to shift the LHRS ytar distribution. | ||
| + | This was decided because, when plotting LHRS vz - RHRS vz for a coincidence cut, the coincidence peak | ||
| + | was shifted from 0. | ||
| + | |||
| + | '''[7] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/LHRS_current_optics.html current LHRS matrix]''' | ||
=== RHRS === | === RHRS === | ||
| Line 53: | Line 63: | ||
with: | with: | ||
| − | D 0 0 0 | + | D 0 0 0 6.146531E-04 8.382911E-02 7.297953E-03 3.822568E-03 1.149510E-02 |
and added the following two lines: | and added the following two lines: | ||
| Line 61: | Line 71: | ||
P 0 0 0 -1.567257E-03 | P 0 0 0 -1.567257E-03 | ||
| − | [ | + | These are overall constant shifts introduced by looking at hydrogen data to shift |
| + | distributions to where there physical values should be (i.e. W 937 -> 938.27 MeV) | ||
| + | |||
| + | '''[8] [http://web.mit.edu/reynier/www/Tritium_optics_matrices/RHRS_current_optics.html current RHRS matrix]''' | ||
Latest revision as of 16:43, 10 August 2018
Contents
Old matrices
The following are the matrices that we used during the online analysis of the experiment:
[1] LHRS default matrix - I cannot find this file. Might be able to retrieve it from github, but it would only be here for legacy reasons.
Optimization steps
LHRS
The following is the LHRS matrix optimized by GMp
The following is an optimization that Shujie did on the GMp LHRS matrix [3] using the standard procedure for optimizing the angles and the sieve runs taken during MARATHON.
[4] LHRS re-optimization by Shujie
Details on Shujie's optimization here
RHRS
The following is the RHRS matrix optimized by GMp
Current (optimized) matrices
LHRS
Replaced in matrix [4] the line:
D 1 0 0 -6.863500E-02 2.633700E-01 1.096600E-02 -7.253300E-02
with:
D 1 0 0 4.932426E-03 2.633700E-01 1.096600E-02 -7.253300E-02
This is the coefficient that relates delta with theta x' fp linearly. We did this to get rid of a slope we saw in Emiss vs. xptar.
[6] matrix with Emiss vs. xptar slope fixed
Last but not least, the term Y 0 0 0 2.670000E-03 was introduced to shift the LHRS ytar distribution. This was decided because, when plotting LHRS vz - RHRS vz for a coincidence cut, the coincidence peak was shifted from 0.
RHRS
Replaced in matrix [5] the line:
D 0 0 0 1.816209E-03 8.382911E-02 7.297953E-03 3.822568E-03 1.149510E-02
with:
D 0 0 0 6.146531E-04 8.382911E-02 7.297953E-03 3.822568E-03 1.149510E-02
and added the following two lines:
T 0 0 0 -2.940000E-03
P 0 0 0 -1.567257E-03
These are overall constant shifts introduced by looking at hydrogen data to shift distributions to where there physical values should be (i.e. W 937 -> 938.27 MeV)
