SoLID Study

Introduction

A collection of studies often involve more than one subsystems

most of codes are at https://jlabsvn.jlab.org/svnroot/solid/study/

timeline and milestone

2017/01-2017/02

Sanghwa, MRPC simulation and digitization

Zhiwen, SIDIS He3 detection eff

Kalyan, SIDIS NH3 detection eff

Kalyan?, SIDIS NH3 trigger rate

Seamus/Yuxiang, electron generator merging resonance and DIS part

Yuxiang, hadron generator (SIDIS He3 window)

Ye Tian, EC for SIDIS and JPsi

Alex, DAQ deatime

??? justification for detector optimization

2016/09-2016/12

what	who	goal by Sep,response to director review	status	goal by Dec,prepare for science review	status
acceptances and efficiency	Zhiwen, Kalyan, Rich Holmes	simple geometry acceptance for all, detailed acceptances and efficiency study for SIDIS He3,PVDIS	ongoing	detailed study for JPsi,SIDIS NH3
PVDIS Q2	Bob Michaels, Paul Souder, Rich Holmes	general method and sensitivities	ongoing	method details
SIDIS impact	Tianbo,Zhihong,Kalyan	transversity,tensor charge for SoLID,SBS,CLAS12	ongoing	other TMD
J/psi bin migration and signal/background	Michael Paolone and Zhiwen Zhao	4 fold and 3 fold	ongoing	?
Magnet optimization	ANL	?		?
EC old trigger function wrapper	Yuxiang	as is	done in March trigger
EC new trigger	Rakitha	PVDIS,SIDIS_He3	PVDIS done PVDIS ECAL Trigger PVDIS Background SummaryPVDIS trigger fuction PVDIS trigger_efficiency_numbers, SIDIS_He3 ongoing	JPsi,SIDIS_NH3
LGC trigger response	Michael	PVDIS,SIDIS,JPis	done in March, can be adjusted (PVDIS threshold: 2P.E, 2pmts for one sector)
SPD and MRPC trigger	Sanghwa	SPD trggier	ongoing	MRPC trigger
PVDIS e trigger	Yuxiang	as is	done in July trigger_rate
SIDIS e trigger	Yuxiang	as is	ongoing
SIDIS hadron trigger	Yuxiang	as is	ongoing
JPsi e trigger	Yuxiang			as is
DAQ deadtime	Alex,Bob	as is	ongoing
GEM response parameterization	Nilanga	with source	onging	with beam
GEM Digitization and Occupancy	Weizhi	SIDIS_He3	done with initial result, need UVa input to finalize	PVDIS,JPis,SIDIS_NH3
tracking	Weizhi	tracking fitting for all, track finding for SIDIS_He3	done with tracking fitting for all, ongoing with track finding for SIDIS_He3	track finding for others
Baffles optimization	Rich	as is	done
Radiation and activation	Lorenzo	as is	done
Kaon identification	TOF group	initial study	done	more study
unified simulation	Zhiwen Zhao and all	as is	done	fine tuning, testing with software framework
software framework	Ole	identify and make the choice, short doc	done with choice, working on doc	testing

full simulation and file sharing

We will run full simulation with all subsystems and generate various files at a shared central location

They can used for studies like acceptance,trigger, background, GEM etc and ensure consistent results

The file size is large in order of 50GB, you can transfer them by using "scp jlabname@ftp.jlab.org:file" or other ways here https://cc.jlab.org/filetransfers

simulation file sharing location by Zhiwen

location on disk /home/zwzhao/solid_simulation
location on tape /mss/halla/solid/sim/solid_gemc/background
dir
  PVDIS_LD2_JLAB_VERSION_1.2
  PVDIS_LD2_JLAB_VERSION_1.3
  SIDIS_He3_JLAB_VERSION_1.2
  SIDIS_NH3_JLAB_VERSION_1.3
  JPsi_LH2_JLAB_VERSION_1.2   
subdir
  pass1
  pass2
  pass3
  pass4
  ...
refer details
  /home/zwzhao/solid/solid_svn/solid/study/background/log_PVDIS_LD2
  /home/zwzhao/solid/solid_svn/solid/study/background/log_SIDIS_He3
  /home/zwzhao/solid/solid_svn/solid/study/background/log_SIDIS_NH3
  /home/zwzhao/solid/solid_svn/solid/study/background/log_JPsi_LH2

file name

"*BeamOnTarget_1e9_skim.root", created by shooting 1e9 electron on target, full SoLID simulation, only events has any entry in any detector is kept, physics list used is "QGSP_BERT_HP+STD+Optical", including hadron,EM and optical process
"*BeamOnTarget_1e9_skim.root", created by shooting 1e9 electron on target directly, only events has any entry in any detector is kept, physics list used is "STD+Optical",meaning no hardon, only EM and optical process
"*dirty_weighted_eDIS_filenum100_1e6.root,  *dirty_normalized_*_pi*HallD_filenum500_5e6.root,  *dirty_normalized_*_allnoeHallD_filenum500_5e6.root"
dirty means full SoLID simulation with physics list "QGSP_BERT_HP+STD+Optical"
weighted means the generator events distribute evenly in certain kinematic space,then have weight linked to crossection and rate
normalized means the generator events distribute according to crossection by probability and weight is a constant for each event
eDIS means electron from target by the DIS electron generator mode in "eicRate" code
pion*HallD means pion from target by the modified hallD generator
allnoeHallD means all particles from the modified hallD generator which has no electron
5e6 are number of event
filenum500 means sum of 500 small files of 1e4=5e6/500 events each

background_solid_PVDIS_LD2_dirty_normalized_allnoeHallD_filenum500_5e6.root

note about normalization

for BeamOnTarget

background_solid_PVDIS_LD2_BeamOnTarget_1e9_skim.root

files from event generators sharing location

  /work/halla/solid/evgen/

list of study

Generator

new electron generator combining both DIS and resonance region with existing code (?)

new hadron generator (Rakitha)

GEM related

GEM digitization validation

SoLID GEM digitization is based on the SBS GEM digitization

According to Evaristo, the SBS GEM digitization is "Unfortunately not validated; we used the old COMPASS data to validate the digitization"

The way to do GEM digitization validation maybe

1. Extract information directly from hardware test
2. do standalone GEM simulations to matching hardware test condition

hardware test can be used

1. some cosmic or beam test with charge particles
2. the latest UVa xray test result (p13 of here) 

charge particle response can provide all input for digitization Solid_GEM_Digitization#GEM_response

low energy photon response can provide additional info about low energy photons convert into ionization to make a GEM hit to anchor simulation, this is important because they dominate the background

neutron background (Lorenzo)

with low neutron physics on, comparing to Fluka result