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Polarized Helium-3 Experiments (E12-06-110/E12-06-121)

Experiment E12-06-110 (A1n) and E12-06-121 (d2n) are scheduled to run from Dec. 3, 2019 to May 6, 2020, with breaks for the X'mas shutdown and the target rotation. These two experiments focus on studies of the nucleon spin structure.

Main Run Information Page

Summer 2019 - E12-06-101/E12-07-105 and E12-15-001

Experiments E12-06-101/E12-07-105 and E12-15-001 are scheduled to run in late June into mid July 2019.

Experiments E12-06-101/E12-07-105 are pion electroproduction experiments and experiment E12-15-001 is a virtual Compton scattering experiment.

RC Links

E12-06-101/E12-07-105 (Pion electroproduction)

The VCS Polarizabilities experiment E12-15-001

Please pay attention as instructions have change (7/25/2019)

- combined runs missing mass spectra (replayed until 7/28 1 PM): [4]

  • Other kinematics:

- Kin Ia, golden run monitoring: [5], combined runs missing mass spectra: [6]


  • All instructions and reference plots can be found in the black binder in the counting house.
Info for Shift Crew: Experiment Info: Resources:
Information for Shift Takers VCS Run Plan MCC White Board
FAQ/How-to Shift Schedule The experiment Redmine
Experts on call Daily Meeting Hall-C Logbook
Shift Summaries Printable Run Sheet Hall-C Controls
Beam Time Accounting (BTA) Analysis Instructions (pdf)
Shift Checklist VCS Batch replay Instructions

E12-09-011 (Kaon LT)

Kaon-LT Redmine Page

Run plans

RC Links

Kaon-LT Setting Status

6.2/8.2 GeV Runplan Overview

PDF file with run plan details: 6.2 GeV, 8.2 GeV

  • Beam checkout
  • Items to be done as soon as possible at 6.2 GeV AND 8.2 GeV
    • Arc energy measurement
    • BPM calibration check with superharps
  • Calibration Runs (HMS/SHMS sieve runs, luminosity scans, heep-check singles and coincidences)
  • 6.2 GeV,
    • Q2=3.0 W=2.32 x=0.40 , low ε data taking
    • Q2=2.115 W=2.95 x=0.21 , low ε data taking
  • 8.2 GeV,
    • Q2=4.4 W=2.74 x=0.40 , low ε data taking
    • Q2=3.0 W=3.14 x=0.25 , low ε data taking
    • Q2=5.5 W=3.02 x=0.40 , low ε data taking

3.8/4.9 GeV Runplan Overview

PDF file with run plan details: 3.8 GeV, 4.9 GeV

  • SHMS beam deflection test plan
    • 3.8 GeV
      • Set SHMS to 6.79 degrees, with all magnets ramped to zero
      • Jay Benesch will execute his beam deflection test plan
      • Shift workers will need to ramp SHMS magnets as directed by Jay (use -3.007 GeV/c settings)
    • 4.9 GeV
      • Jay has agreed to defer the SHMS beam deflection study until we get to the 6.00 deg setting in the run plan, expected to be morning of Dec 17.
  • Beam checkout
  • Items to be done as soon as possible at 3.8 GeV AND 4.9 GeV
    • Arc energy measurement
    • BCM calibration
    • BPM calibration check with superharps
  • Calibration Runs (Heep-check singles and coincidences)
  • 3.8 GeV, Q2=0.5, W=2.40, x=0.09, low ε data taking
  • 4.9 GeV, Q2=0.5, W=2.40, x=0.09, high ε data taking

10.6 GeV Runplan Overview

PDF file with run plan details: [7]

  • SHMS beam deflection test plan
    • Set SHMS to 6.66 degrees, with all magnets ramped to zero
    • Jay Benesch will execute his beam deflection test plan
    • Shift workers will need to ramp SHMS magnets as directed by Jay (use -8.035 GeV/c settings)
  • Beam checkout
  • Detector checkout
  • Trigger checkout
  • Items to be done as soon as possible at 10.6 GeV
    • Arc energy measurement
    • BCM calibration
    • BPM calibration check with superharps
  • Calibration Runs (Optics, Heep-check singles and coincidences)
  • Q2=3.0, W=2.32, x=0.40, high ε data taking
  • Q2=2.1, W=2.95, x=0.21, high ε data taking
  • Q2=4.4, W=2.74, x=0.40, high ε data taking
  • Q2=3.0, W=3.14, x=0.25, high ε data taking
  • Luminosity scan
  • Q2=5.5, W=3.02, x=0.40, high ε data taking
  • Run Plan for Kaon LT 10.6GeV End Game

SIDIS pt experiment E12-09-017 Fall 2018

SIDIS CSV experiment E12-09-002

CSV Run Plan

The J/ψ-007 Experiment

Jpsi007.png

Online RC Info Resources
Information for Shift Takers Run Plan Official Website
FAQ/How-to Shift Schedule Redmine
Experts on call Daily Meeting Internal Redmine
Instructions for Shift Takers Hall-C Logbook
Shift Summaries Hall-C Controls
Beam Time Accounting (BTA) MCC White Board
Shift Checklist

Past run plans

Hall C Links

Hall C

Hall C is one of four experimental halls at JLab.

Hall C Computing.

Hall C in the Press.

Basic Equipment in Hall C

Beam Energy

Beamline

SHMS Magnets

For the Fall 2017 run, see intructions at https://hallcweb.jlab.org/wiki/index.php/How-to

The formulas and program should be kept in sync with the repository.

  • Formulas used for setting current of SHMS magnets during KPP
Magnet Formula
HB Current = 330.05*p - 3.1784*p^2 + 0.4018*p^3
Q1 Current = 222.4*p - 7.709*p^2 + 0.6684*p^3
Q2 Current = 3661*p/11
Q3 Current = 2434*p/11
Dipole Current = 3450*p/11

Scattering Chamber

  • The scattering chamber window on the SHMS side is 0.020 inches thick 2024-T4 aluminum.

SHMS Entrance Window and Vacuum vessel

  • The Horizontal Bender entrance window is 0.010 inches thick 2024-T3 aluminum.
  • The dipole exit window is 0.020 inches thick 5056 aluminum.

Target

Spring 2017 KPP run

Fall 2017 run

  • Logbook entry on the Fall target configuration which has links to file describing the targets and their thicknesses and a file with the mechanical drawing of the target ladder.
  • BeO target was replaced by the "halo" cylinder target. Logbook entry with drawing of "halo" cylinder target.
  • Drawing of target ladder with cryo cells and solid target ladder.
  • Drawing of cryotarget cell with 2.5inch diameter and 10 cm long (after using insert entrance window). Used for separate LH2 and LD2 cells in ladder.
  • Drawing of cryotarget with 1.6 inch diameter for 4cm cell.
  • Drawing of cryotarget with 1.6 inch diameter for 10cm cell.

HMS Magnets and Vacuum Vessel

HMS Detectors

SHMS Detectors

DAQ & Trigger

Controls

  • High Voltage
  • Spectrometer Controls (Use go_cmagnets command)
  • HMS and SHMS Collimator Control document.
    • NOTE: Do not attempt a reset of the collimator controls unless you have reason to believe that the collimator has moved and have checked with the RC

Online Replay

Data Analysis

Monte Carlo

Hall C at 12 GeV

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