NPS Subsystems

NPS Layout

• NPS detector carriage assembly (2021)

• Pic 1
• Pic 2
• Pic 3

• NPS layout images (2019)

• Initial cabling evaluation (2016)

• Beam pipe considerations (2013)

NPS Magnet

• NPS Sweeper Magnet and LCW Parameters (posted: 06/17/2021)

• Magnet Power Supply requirements:

• PSU with current greater than 1,100A for some overhead
• No need for a polarity switch, either for the run or for testing. Simple enough to mechanically swap the leads if needed for testing

• Assembly (2018-2019)

• Photo 1 (March 2019)

• Construction updates

• March 2017
• Main coil (November 2017)

• Background studies (2016)

• Vertical vs horizontal field
• Effect of field on PMTs
• Shielding concept

• Fringe field considerations (2016)

• Summary impact on HMS optics

• Minimum aperture layout (2016)

• Initial calculations (2015)

Calorimeter

• Frame

• NPS temperature
• Temperature sensors
• Cooling system

• Crystals

• Specifications
• Shape and dimensions
• Raw material analysis
• Testing facilities: CUA, Orsay, Giessen
• Characterization results
• Wrapping procedure

• PMTs and HV dividers

• Socket modification for 100 articles (2017)
• Tests with laser, long cable runs, fADC (2017)

• Cables

• Low voltage

• Detector Support Group

• High Voltage cables fabrication and testing
• CAEN HV system testing

• NPS prototype studies

• 3x3 prototype report (2019)

• Updates from test run and calibrations (Spring 2018)

• 12x12 array (NPS prototype/ComCal) - password required
• Initial design concepts LMS and Curing and 3x3 prototype (2013-2014)

• Initial component studies

• Background radiation dose at calorimeter (2016)
• Crystal temperature dependence (2015)
• Irradiation crystals at JLab,Idaho, and Caltech (2014-2015)

• LED studies - PMT sensitivity (2014)

DAQ and Trigger

• Initial equipment count and rate estimates (2017)

Controls

• Detector Support Group

• Control and monitoring screens development
• Interlock system

Data Analysis

• DVCS experiments analysis

• elog

• Hall C SIDIS Analysis Wiki

• WACS 6 GeV analysis

• NPS software

Monte Carlo

• NPS Geant4 simulation for Hall C DVCS - GitHub: use DVCS_evt_gen/.

• A very short User Guide.

• NPS calorimeter simulation

• GEANT4 for background simulation

• DVCS simulation for proposal rate estimation

• WACS simulation for proposal rate estimates

• Background studies in WACS pi0

• [https://wiki.jlab.org/cuawiki/images/3/3c/Root-geant4-eclipse.pdf Setting Up ROOT (and Geant4)

Development Environment on Linux with Eclipse IDE], reach out with questions to Petr Stepanov

Experiments

• DVCS/pi0 (E12-13-010)

• SIDIS pi0 (E12-13-007)

• WACS (E12-14-003, E12-14-005)

• TCS (C12-18-005)

NPS Assembly preparations

• NPS reflector (ESR) preshaping procedure