1 / 8

Overview of Onsite Progress

Overview of Onsite Progress. Jian-ping Chen g 2 p /G ep Collabroation Meeting. Major equipments for g 2 p /G E p experiments. Polarized Solid NH 3 Target (Hall C/UVa target) Target material irradiation Beamline (Similar to Hall C)

Download Presentation

Overview of Onsite Progress

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Overview of Onsite Progress Jian-ping Chen g2p /Gep Collabroation Meeting

  2. Major equipments for g2p/GEp experiments • Polarized Solid NH3 Target (Hall C/UVa target) • Target material irradiation • Beamline (Similar to Hall C) • Magnetic Chicane/Beamline modifications. • Low beam current BCM/BPMs • Slow Raster • Hall A Engineering/Design • Local Beam Dump • Hall Infra-structure • Scattering Chamber/ Target/magnet mount • Septum Magnets • Simulations/Optics/Spectrometer/Detectors/QAD… Use existing equipments Hall C beamline/target Keep change minimum modify the existing PREX septa use simple local beam dump FZ2 Telescoping Stand FZ1 FixedStand BPMs Slow Raster TARGET Septa/HRS DUMP REGION 1 REGION 2 REGION 3 REG 4 REGION 5

  3. Overview of Progress • Significant Progress in Beam Line System (T. Michalski, B. Dillon-Townes) • Overview conceptual design completed • Region 1 and Region 2 design drawings completed • Region 3 main items identified and detail design on-going • Existing hardware items (magnets, raster, power supplies) located • New items (BPM electronics, Harps, BCM, BD magnets, …) • Target Progress (C. Keith/ D. Crabb) • Conceptual design • Rotating seal • Pumps ordered • New fridge at UVa tested (along with existing target materials and other systems) • need to manufacture one fridge at JLab • Target material irriadiation: will do it at NIST • Magnet is being shipped from Oxford back to JLab? • Hall A infrastructure, Beam dump, Septum (A. Gavalya, R. Wines) • Setup at the pivot area for the target • Beam dump • Septum • Scattering chamber/ layout/ interferences • 3rd Arm for polarization monitoring • Simulations

  4. Kinematic Settings (Last Meeting) 3.3 GeV, 12.5 deg 2.2 GeV, 15 deg 3.3 GeV, 6 deg 2.2 GeV, 6 deg 1.6 GeV, 6 deg 1.1 GeV, 6 deg Polarized beam: 50-130 nA up to 5 uA? for optics, 30 uA ? for Compton Polarized NH3 target Slow Raster 25 mm diameter Gep configuration is now basically g2p at the elastic setting Two configurations: with septa (6 degree) (target at 87 cm upstream) and without septa (12.5 and 15 degrees) (target at original pivot) g2p needs target at 90 degrees for all and 0 degree for 3.3 GeV GEp needs target at 80 degree

  5. Kinematic Settings (Now) 3.3 GeV, 12.5 deg 2.2 GeV, 12.5 deg 3.3 GeV, 6 deg 2.2 GeV, 6 deg 1.6 GeV, 6 deg 1.1 GeV, 6 deg Polarized beam: 50-130 nA up to 1 uA for optics, (also for Compton?) Polarized NH3 target Slow Raster 20-25 mm diameter Gep configuration is basically g2p at the elastic setting Two configurations: with septa (6 degree) (target at 87 cm upstream) and without septa (12.5 and 15 degrees) (target at original pivot) G2p : target at 90 degrees for all and 0 degree for 3.3 GeV GEp : target at 20 degree?

  6. Budget and User Contributions • Cost, mostly consistent with initial estimation, some increase due to new items • A) Beam line procurement: 14 BMP electronics • harps (can not use the existing French harps) • Beam line manpower: the two items above + software group • B) Target group estimation, procurement increased from 80 K to 140K. • FY11, continuing resolution • addition funding from DOE (promised) not here yet. • User pledged contribution to procurement : $ 80K • to Engineering/Installation: ? • Total: $140K • Will need user to honor the pledges. • Manpower cost will be supplied from within JLab. • Need help from user manpower

  7. Questions and Issues • Should we do Compton with 1 uA, straight-through, how many times? • How should we do optcis study-? What optics target(s) should we have? • How to do the polarization monitoring (3rd arm)? • Should we do a field map at EEL? • Should we add some iron plates to study the effect? • Should we and how to measure field direction? • Should we do a field map in Hall A (combining target/septa)? • …?

  8. Onsite User/Hall A People Power • PhD Students: • Pengjia Zhu (USTC, advisor: Yunxiu Ye), 3rd year, onsite, (beamline, target) • Min Huang (Duke, Haiyan Gao), 3rd year, onsite, (simulation, optics) • Chai Gu (UVa, Nilanga Liyanaga), 2nd year, onsite from 2/2011 • Melissa Cummings (W&M, Todd Averett), 2nd year, onsite from 5/2011 • A student from Temple (Zein-Eddine Meziani), 2nd year, onsite from 5/2011? • Name? (New Hampshire, Karl Slifer), 1st year, onsite from? • ? • Postdocs: • Kalyan Allada (Hall A), beamline, 3rd arm • Jixie Zhang (Hall A): simulation, optics • Xiaohui Zhan (Argonne) (onsite from 2/2011), target? • Narbe Kalantarians(UVa): target • Hovhannes Baghdasaryan (UVa) ? • Sarah Philips (New Hampshire) ? • ? • Physicists: • Jian-ping Chen (Hall A): Project manager, overall coordination • Alexandre Camsonne (Hall A): Beam line, DAQ, … • Karl Slifer (New Hampershire): Overall consideration, run plan, … • Doug Higinbotham (Hall A) (will be more available after SRC experiments?) • Guy Ron (LBNL)? • ?

More Related