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Pion-LT (E12-19-006)

Pion Electroproduction Cross Section at 11 GeV and Measurement of the Charged Pion Form Factor to High Q2

RC Meeting Zoom Link - Meeting ID: 160 710 0885

RC Daily Meetings and Runplans (Summer 2022)

Run period 3 (high epsilon): 06-June-2022 - 10-Aug-2022

Run period 2 (low epsilon): 16-Aug-2021 - 07-Feb-2022

RC Links

Previous Meeting Pages

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

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

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.

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

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

Pion-LT E12-19-006 (Run period 1: Low Q2)

https://redmine.jlab.org/projects/hall-c/wiki

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

~!Begin CAM

EMC and X>1 Experiments (E12-10-008/E12-06-105)

The inclusive electron scattering cross-section will be measured for several light to medium heavy nuclei over a broad range of x (0.1 < x < 1) and at x greater than one (x > 1).

RC Meeting Zoom Link - Meeting ID: 160 710 0885

RC Daily Meetings (Fall 2022)

Run period 1 (Target Ladder 1):

Tentative Dates: 23-Sep-2022 - 1-Dec-2022

Run period 2 (Target Ladder 2):

Tentative Dates: 4-Dec-2022 - 19-Dec-2022

Run period 3 (Target Ladder 2 continued):

Tentative Dates: 17-Jan-2023 - 20-Mar-2023

RC Links

~!End CAM

Past run plans

Hall C Links

Hall C

Common Hall C Training Requirements

NOTE: These are the commonly required training to access and run shifts in Hall C.

The formal requirements will be outlined in the Run Safety Documentation for your particular experiment.

Contact a spokesperson and/or the RC if you have questions.

  • Annual Security Awareness (GEN034) • Expires: Annually (January)
  • Physics Division Work Governance (SAF116kd) • Expires: Annually (January)
  • General Access RWP (SAF801kd) • Expires: Annually (December)
  • Oxygen Deficiency Training (SAF103) • Expires: Annually (24 months from date taken)
  • ES&H Orientation (SAF100) • Expires: Annually (24 months from date taken)
  • RadWorker 1 Written Test (SAF801T) • Expires: Annually (24 months from date taken) • Must be taken on-site -- register well in advance if the Lab is still in a MedCon status!
  • Hall C Walkthrough (SAF112) • Expires: Never • Must be done at JLab during a down. Schedule in advance!

These are also required as long as JLab is in an elevated MedCon status due to the COVID-19 pandemic

Many courses are Web based and can be found on the JLab Training Page.

You can check your training status online.

Also, don't forget to register your visit at least 7 days prior to your trip:

Recommended Mailing Lists

Recommended Mailing Lists JLab runs many Mailing Lists to communicate with its Staff and Users. Most are available for general sign-up by clicking on the relevant link and following the instructions.

There are a few Mailing Lists that Hall C Users are strongly encouraged to subscribe to:

There are also experiment specific Mailing Lists. Contact the Experiment Coordinator if you do not see yours here:

Basic Equipment in Hall C

Beam Energy

Beam Current Monitoring (BCM)

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

SHMS optics page

SHMS Survey data

SHMS Collimator/Sieve

  • The SHMS collimator/sieve assembly is located between the Horizontal Bender and the first quadrupole.
  • The SHMS collimator/sieve are made of Mi-TechTM Tungsten HD-17 (Density 17 g/cc. 90% W, 6% Ni, 4% Cu).
  • The SHMS collimator is a flared octagonal aperture with thickness of 2.5 inches.
  • There are two SHMS sieves. Each with thickness of 1.25 inches.
  • The sieves have the same hole pattern but one sieve has the hole pattern horizontally shifted by half the hole spacing.
  • Drawings of the collimator and two sieves.
  • The drawings show details of the sieve hole patterns and the collimator shape.

SHMS optics data

HMS Optics

HMS Survey data

HMS Collimator

  • The HMS collimators/sieve assembly is located in 166.4 cm from the target in front of the first quadrupole.
  • The HMS collimators/sieve are made of Mi-TechTM Tungsten HD-17 (Density 17 g/cc. 90% W, 6% Ni, 4% Cu).
  • The HMS collimators are both a flared octagonal aperture with thickness of 2.5 inches.
  • There are two HMS collimators which are designated as the "larger" and "small" collimators.
  • Drawing of the small collimator. It is labelled as the "top" collimator in the drawing. The "center" collimator is the drawing was replaced by the present day large collimator.
  • Could not find a drawing of the present day large collimator.
    • The dimensions are front (back) opening in the horzontal direction are 4.575cm (4.759cm) along top of octagon and 9.150cm (9.518cm) at the vertical middle of the octagon.
    • The dimensions are front (back) opening in the vertical direction are 11.646cm (12.114cm) along side of octagon and 23.292cm (24.228cm) at the horizontal middle of the octagon.
  • The HMS sieve has thickness of 1.25 inches.
  • Drawings of the sieve.

HMS optics data


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.

Sept 2021 run

June 2022 run

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.
    • See Collimator controls on How-to page
    • 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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