1ARR Phase 4 ● Jan 9–10, 2017

Hall C KPP Run Plan

Accelerator Readiness ReviewPhase 4 • January 9–10

Brad Sawatzky

2ARR Phase 4 ● Jan 9–10, 2017

Hall C KPP

1.Detector running for 8 hours recording data from all subsystems.

2.Screenshots of beam status and/or accelerator e-log entries demonstrating electron beam current and energy.

3.Data showing relative timing of trigger, tracking, and particle identification in detector sybsystems.

4.Figures demonstrating charged-particle tracks from position-sensitive detectors.

5.Particle identification plots using signals from calorimetry and Cerenkov detectors.

Detector operational: events recorded with a > 2nA electron beam at > 6 GeV beam energy (3 pass).

3ARR Phase 4 ● Jan 9–10, 2017

Hall C KPP Run Plan (Overview)

• Beam Requirements: Energy: > 6 GeV/c Current: 5–10 μA Polarization: N/A

• SHMS Settings: Angle: 15° Momentum: 6 GeV/c

• Initial Steer-up: <ATLis 16570> Goals:

Establish beam to Dump with SHMS magnets at production settings.

Snapshots results to satisfy KPP2

• Initial Hall C Beamline, Raster, Instrument. Checkout Goals:

Establish beam positioning on target Satisfy KPP 3, 4, 5 on BeO/Carbon foil Clock starts on 8 hours of recorded data for KPP1

See also: https://hallcweb.jlab.org/wiki/index.php/KPP_Run_Plan

4ARR Phase 4 ● Jan 9–10, 2017

Hall C KPP Run Plan (Overview)• Initial Hall C Beamline, Raster, Instr. Checkout (cont...)

DAQs are running; Solid target in place (BeO, C) Online shift-crew will proceed with checkout procedure while

dedicated Offline shift-crew will use data to satisfy KPP 3, 4, 5 (detector timing, energy tracks, PID from SHMS systems)

Procedure (rough bullets): View beam on BeO target; log target cam snapshot Image Carbon-Hole target with rastered beam and raw SHMS

triggers (tuned track reconstruction not required.)

• Begin Detector Checkout and Spect. Optics Program Goals:

Continued data taking on target... Offline shift-crew will use data to satisfy KPP 3, 4, 5

(if not already accomplished) At 8 hours of accumulated data, log KPP 1 completed

~ Hall C Key Performance Parameters Established ~

5ARR Phase 4 ● Jan 9–10, 2017

Initial Steer-up

• MCC driven process→ATLis 16570

» Tune beam» No target» Raster OFF

• Goals→Beam to dump w/

SHMS magnets at production settings

• Satisfy KPP #2→“Screenshots of beam

status and/or accel elog entries demonstrating beam current and energy.”

• Hall C will log:

6ARR Phase 4 ● Jan 9–10, 2017

Initial Raster, Instrum. Checks• Goals

→Determine beam is roughly centered in beam pipe and on target

→Begin collecting data for KPP 3, 4, 5

• Requires→SHMS DAQ, YAG

viewer; HARPs→Targets: BeO,

Carbon-Hole→Beam: 5–10 uA CW

(maximum)

• Online shift crew will start/stop DAQs

→Harp scans→Raster checkout→Beam position checks→Target align.

checks• Offline crew focus

on data analysisfor KPP 3, 4, 5

7ARR Phase 4 ● Jan 9–10, 2017

Begin Spectrometer Checkout• Goals

→Continue collecting data for KPP 3, 4, 5

→Collect data for gain matching, time offset calibrations, track recon. params

→Evaluate/optimize spectrometer magnet optics tune

• Requires→SHMS (HMS) DAQ→Targets: Carbon foil→Beam: 5–10 uA CW

• Online shift crew will→Execute run plans being

compiled here:» Detector Commissioning» Optics Working Group» Optics Commissioning

• Offline crew focus on data analysis for KPP 3, 4, 5 first, spectrometer commissioning second

→NOTE: KPP requirements are a natural early byproduct of the Commission run-plans.

8ARR Phase 4 ● Jan 9–10, 2017

Spectrometer Checkout (cont...)

• [KPP 3] Rel. timing of trigger, tracking, PID in detectors

→Timing» TDC spectra from

hodoscopes, calor, Cerenkov

→PID» dE vs E in Calorim» Cerenkov ADC vs

Calorim PID

9ARR Phase 4 ● Jan 9–10, 2017

Spectrometer Checkout (cont...)

• [KPP 4] Charged particle tracks from wire chambers

→Event display software shows hits in hodoscopes w/ track overlay from analyzer reconstruction

• [KPP 5] PID plots from Calorim. and Cerenkov

→See also: KPP 3

10ARR Phase 4 ● Jan 9–10, 2017

Spectrometer Checkout (cont...)

• [KPP1] Detectors running for 8 hours recording data from all subsystems.

→Snapshot of run-start/stop logbook entries

→Snapshot of timestamped list of data files

11ARR Phase 4 ● Jan 9–10, 2017

KPP Goals Completed

✔ Detector running for 8 hours recording data from all subsystems.

✔ Screenshots of beam status and/or accelerator e-log entries demonstrating electron beam current and energy.

✔ Data showing relative timing of trigger, tracking, and particle identification in detector subsystems.

✔ Figures demonstrating charged-particle tracks from position-sensitive detectors.

✔ Particle identification plots using signals from calorimetry and Cerenkov detectors.

Detector operational: events recorded with a > 2nA electron beam at > 6 GeV beam energy (3 pass).

12ARR Phase 4 ● Jan 9–10, 2017

Continue to Detector Commissioning...

• Shift focus to include HMS checkout as well

• Gain matching and energy calibration of detectors

• Fine tune timing offsets• Optics calibration and

studies

• Efficiency / Deadtime studies

• Momentum scans• Cross check SHMS

response vs. HMS• Etc...

• Run with beam as long as permitted in Spring.• More rigorous offline studies over Summer.• Return in Fall to complete any remaining

Commissioning items and begin experimental program.

13ARR Phase 4 ● Jan 9–10, 2017

Personnel / Experts On-call

• Noble Gas Cherenkov→ D. Day (UVa)

» M. Yurov, et al.• Drift Chambers

→ E. Christy (Hampton)» D. Biswas, et al.

• Aerogel Cherenkov→ T. Horn (Cath. U)

» A. Mkrtchyan, et. al• Calorimeter

→ H. Mkrtchyan (Yerevan)» V. Tadevosyan,

A. Asaturyan

• Heavy Gas Cherenkov→G. Huber

» W. Li• Hodoscopes

→ G. & M. Niculescu (JMU)

→A. Ahmidouch (SUNO)

→S. Malace (NSU)

• Hall C and Hall A Staff Scientists + Post Docs

→DAQ, Beamline→HMS Detectors→General Support