Integrating solenoid code & GUINEA-PIG slicing Yngve Inntjore - - PowerPoint PPT Presentation

Integrating solenoid code & GUINEA-PIG slicing

Yngve Inntjore Levinsen

CERN

• 26. of April, 2012

Introduction

Status of IR tracking code integration into PLACET (experimental solenoid inclusion) Study of the relevance of slicing in GUINEA-PIG

2 / 7

IR Tracking

Overview Separate code by Barbara now rewritten to fit into PLACET.

3 / 7

IR Tracking

Overview Separate code by Barbara now rewritten to fit into PLACET. Code has been checked and tracks correctly without solenoid

• active. Solenoid part still needs some debugging.

New command(-s) in the TCL interface ready.

3 / 7

IR Tracking

Overview Separate code by Barbara now rewritten to fit into PLACET. Code has been checked and tracks correctly without solenoid

• active. Solenoid part still needs some debugging.

New command(-s) in the TCL interface ready. Simulation procedure kept similar to previous philosophy of Barbara. Development can be followed in cvs branch “irtracking”.

3 / 7

IR Tracking

Example:

... TclCall

• script {save_beam

$name1} ... BeamlineUse

• name

test.ffs TestNoCorrection

• beam

beam1

• emitt_file

emitt.dat ... BeamRead

• file

$name1

• beam

beam2 BeamlineUse

• name

test.ffs.last TestIntRegion

• beam

beam2

• emitt_file

emitt.dat

• angle 0.007
• step 0.005
• synrad 1
• filename

SiD+ antiDID_2005.txt

4 / 7

GUINEA-PIG slicing

Noticed by accident when using one script with 20 slices and another with 100 slices giving different luminosity.

5 / 7

GUINEA-PIG slicing

Noticed by accident when using one script with 20 slices and another with 100 slices giving different luminosity. Increase in number of slices ->

lower peak luminosity higher total luminosity

5 / 7

GUINEA-PIG slicing

Noticed by accident when using one script with 20 slices and another with 100 slices giving different luminosity. Increase in number of slices ->

lower peak luminosity higher total luminosity

Investigations so far points to a required number of slices of around 50-60. Usually, 20 slices have been used in simulations up until now (?) Results have not yet been confirmed, neither fully understood!

5 / 7

GUINEA-PIG slicing

Noticed by accident when using one script with 20 slices and another with 100 slices giving different luminosity. Increase in number of slices ->

lower peak luminosity higher total luminosity

Investigations so far points to a required number of slices of around 50-60. Usually, 20 slices have been used in simulations up until now (?) Results have not yet been confirmed, neither fully understood! Results can be found in http://cern.ch/yngve/placet_testing...

5 / 7

GUINEA-PIG slicing

Increased cut_x,cut_y to 400/35. 600 000 particles in total (constant) -> more than 8000 particles per slice.

10 20 30 40 50 60 70 80

Number of slices

5.2 5.4 5.6 5.8 6.0 6.2 6.4 6.6

Total Luminosity [1034 /cm2 /s]

6 / 7

GUINEA-PIG slicing

Increased cut_x,cut_y to 400/35. 600 000 particles in total (constant) -> more than 8000 particles per slice.

10 20 30 40 50 60 70 80

Number of slices

1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35

Peak Luminosity [1034 /cm2 /s]

6 / 7

GUINEA-PIG slicing

Increased cut_x,cut_y to 400/35. 600 000 particles in total (constant) -> more than 8000 particles per slice.

10 20 30 40 50 60 70 80

Number of slices

1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35

Peak Luminosity [1034 /cm2 /s]

2.1 2.0 => 5%

6 / 7

GUINEA-PIG slicing

Increased cut_x,cut_y to 400/35. 600 000 particles in total (constant) -> more than 8000 particles per slice.

10 20 30 40 50 60 70 80

Number of slices

0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.46

Peak / Total

6 / 7

GUINEA-PIG slicing

Increased cut_x,cut_y to 400/35. 600 000 particles in total (constant) -> more than 8000 particles per slice.

10 20 30 40 50 60 70 80

Number of slices

50 100 150 200 250

Simulation time [s]

6 / 7

Summary

IR Tracking code well on the way. Potential issue with GUINEA-PIG slicing observed, to be checked by experts (Daniel and/or Barbara, thanks in advance for helping!)

7 / 7