Bug #1640: EMR bar size incorrect by factor 2? - MAUS - MICEmine

Bug #1640

EMR bar size incorrect by factor 2?

Added by Rogers, Chris about 8 years ago. Updated almost 8 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Drielsma, François

Category:

EMR

Target version:

Future MAUS release

Start date:

10 March 2015

Due date:

01 April 2015

% Done:

100%

Estimated time:

Workflow:

New Issue

Description

I ran a Monte Carlo data set using the EMR. I plotted EMRHit.GetPosition().x() against EMRHit.GetChannelId().GetBar() % 59 + 1 and for all hits in the Monte Carlo. It looks like the position is in the range (-225, 225), which I think is wrong by a factor 2? Or maybe I am doing something stupid?

I attach my monte carlo datacards, simulation script, geometry file and a sample root output file.

Files

truth_position_vs_bar_number.png (12.8 KB) truth_position_vs_bar_number.png		Rogers, Chris, 10 March 2015 11:29
emr_and_polarised_decay_config.py (2.23 KB) emr_and_polarised_decay_config.py		Rogers, Chris, 10 March 2015 11:29
EMRGeometry.dat (629 Bytes) EMRGeometry.dat		Rogers, Chris, 10 March 2015 11:29
simulate_emr.py (1.5 KB) simulate_emr.py		Rogers, Chris, 10 March 2015 11:29
maus_mc_output_production_threshold_0.1_physics_processes_standard_cards_0.root (2.58 MB) maus_mc_output_production_threshold_0.1_physics_processes_standard_cards_0.root		Rogers, Chris, 10 March 2015 11:29
bar_vs_truth.png (23.5 KB) bar_vs_truth.png	TH2 with corrected geometry	Drielsma, François, 23 April 2015 15:26

Updated by Rogers, Chris about 8 years ago

Category set to EMR
Assignee set to Drielsma, François

Inline the plot for your convenience

Updated by Rogers, Chris about 8 years ago

Just to be complete, my command line was

./simulate_emr.py --configuration_file emr_and_polarised_decay_config.py \
    --output_root_file_name data/maus_mc_output_production_threshold=0.1_physics_processes=standard_cards=0.root \
    --production_threshold 0.1 --physics_processes standard --default_keep_or_kill True

Updated by Drielsma, François about 8 years ago

Hello Chris,

It's a problem that I've unravelled very recently and it's probably not fixed in the trunk quite yet. The geometry of the EMR in MAUS is wrong. I don't know when it was made but the orientation of the planes is incorrect and so is the size of the bar. Everything is fixed in my branch but there is still a test failure under investigation before it can be merged to the trunk. The x position should range from more or less -500 to 500.