Page History

Table of Contents

Overview

...

What do you need to know about the polarized target system?

...

The polarized target system consists of 6 major subsystems:

1. The cryogenic Evaporation Fridgeis designed to provide high cooling power (1 W) at 1 K.
2. The Pump Stack is two 7000 m³/hour in parallel backed by a 7000 m³/hour backed by a 755 m³/hour rotary vane.
3. The NMR (Nuclear Magnetic Resonance) system is needed to measure the polarizationof the sample.
   
4. The CPI EIO (Extended Interaction Oscillator)is a microwave generator used in DNP.
5. The Target Material is a frozen solid material with the necessary characteristics for nucleon polarization.
6. The Oxford Superconducting Magnet is vertically pointing split pair magnet needed for DNP.

   
   

   Ready to go
   What did you change? Notify watchers
    

   
   
   
   

Image Added

What is special about the Drell-Yan Target

This system has the longest (along the beam-line) target cell to date for an evaporation fridge, this requires a unique microwave distributing horn and three NMR coils per target cell to further reduce systematics in the polarization measurement.  This system was configured with the intention of having the greatest instantaneous luminosity of any previous evaporation system by having a beam intensity of 3X10¹² protons/sec for 5 seconds while using a large pump system 17,000 m³/hour (16,800 m³/hour at 60Hz).  We are also running an experiment with both polarized protons and neutrons which share different sensitivity to the overall figure of merit of the Drell-Yan asymmetry.

Target Details

Introduction to the Drell-Yan PT

Polarized Target Expert

Polarized Target Operator

System Photos

Target Logbook

Polarized Target Training

Polarized Target Summary
Anneal Summary
Target Operators
Target Troubleshooting

Target Training Information

Training Target Operators consist of the General Target Training Pack,
followed by a practical course when the target is installed and running.

General Target Training Pack
Target Expert Duties
Target Operator Duties

Target Operation Procedure

PDP Restart Procedure
Cryo Screen Restart Procedure
Target Movement Procedure
New Baseline Procedure
Thermal Equilibrium Measurement Procedure
Prepare Fridge for Polarization
Anneal Procedure
Target Replacement Procedure
Magnet Energization Procedure
NMR Setup Instructions

Target Documentation

Target Device List
LabVIEW Virtual Instrument (VI) Manual
Microwave Generator Manual
Magnet Power Supply Operation
Piping and Instrumentation Diagram
Hardware Manuals
Cernox Target Insert Sensors
Target To Do List Before Fermilab
Target To Do List At Fermilab
Target To Do List for Anchit
Target To Get List (still needed equipment)
Request Service from Fermilab
Full Equipment List to be sent Fermilab
Parts List By Subsystem
Target Mechanics
Simulations
Experiment Schedule
Penetration in Cave

This is the home page for your wiki. To add text to it:

1. Click the EDIT button in the menu bar above and select the Edit this Page option.
2. In the editor that appears, delete this "starter" text , and type in the text that you want to appear instead.
3. To format the text, use the formatting icons on the menu bar at the top of editor.
4. Click the Save button when you are done.
5. Seem to be able to edit and make this look nice Especially for Fat people

Getting Further Help

The UVa Knowledge Base is an online resource with tips about how to use Confluence and other software systems. You can always find the link to the Confluence documentation in the Knowledge Base by clicking on the TOOLS, and then selecting the UVa Knowledge Base: Confluence. The following are a few handy links to specific sections within that documentation: Wiki Markup{div:class=arrow-link open-tab} h2. Overview h4. [Get Started|https://wiki.shanti.virginia.edu/x/yCjHAg] h4. [Manage Access|https://wiki.shanti.virginia.edu/x/pSjHAg] h4. [Edit Content|https://wiki.shanti.virginia.edu/x/vyjHAg] h4. [Organize Content|https://wiki.shanti.virginia.edu/x/ISjHAg] h4. [Add Features|https://wiki.shanti.virginia.edu/x/uyjHAg] h4. [Rights and Obligations|https://wiki.shanti.virginia.edu/x/7S3HAg] h2. Polarized Target Training *[G2p Target Summary] *[[Anneal Summary Table]] *[http://hallaweb.jlab.org/experiment/g2p/target/ Target eLog] - Operators, check this twice a shift to ensure screenshots are current! *[[Target Troubleshooting Procedures]] ==Training Materials== Training for g2p target operators will consist of a brief online quiz on the topics covered here on the Wiki, followed by a practical course when the target is installed and running in the hall. The primer is also available as a PDF: [[Image:G2p target primer.pdf]]. *[[Practical Primer on the UVa Target]] *[[Polarization Display Panel (PDP) Overview]] *[[Target Operator Duties]] *[https://userweb.jlab.org/~jmaxwell/g2p/g2p_target_training.pdf Target Training Slides] '''Take the quiz after you've read the above primer closely, and taken a look at the two others as well:''' *[[Online Target Operator Quiz]] **[[List of Certified Target Operators]] ==Operational Procedures== *[[PDP Restart Procedure]] *[[Cryo Screen Restart Procedure]] *[[Target Movement Procedure]] *[[New Baseline Procedure]] *[[Thermal Equilibrium Measurement Procedure]] *[[Prepare Frig for Polarization]] *[[Anneal Procedure]] (Experts only) *[[Running with No Helium for Optics]] (Experts only) *[[Target Replacement Procedure]] (Experts only) *[[Magnet Energization Procedure]] (Experts only) ==g2p Target Documents== *[https://hallaweb.jlab.org/wiki/images/f/f1/Logbook.pdf Target Logbook] *[http://www.jlab.org/~pzhu/report/Polarized_Proton_Target.pdf Introduction to the Target] by P. Zhu *[https://hallaweb.jlab.org/dvcslog/g2p/10 Target cooled down] *[https://poltar.jlab.org/drupal/filebrowser/download/648 Design Criteria for Polarized Target Vacuum Dewar, Oxford Instruments, 1991] *[https://poltar.jlab.org/drupal/filebrowser/download/648 Relief Analysis of Hall C Polarized Target] *[https://poltar.jlab.org/drupal/filebrowser/download/650 Relief Analysis of Hall B Polarized Target] *[http://www.example.com Hall B Magnet Refit Calculations (under review)] ==Links== '''University of Virginia Target Group Links:''' * [http://twist.phys.virginia.edu/ UVa Target Group Homepage] * [https://hallcweb.jlab.org/experiments/sane/wiki/index.php/UVa_Polarized_Target Target Page on SANE Wiki] * [http://galileo.phys.virginia.edu/~dbd/PolarizedTargetPhotos.html Target Photos and Procedures from Donal's Webpage] ===Pertinent Papers:=== * [http://www.sciencedirect.com/science/article/pii/S0168900298014314 A solid polarized target for high-luminosity experiments], ''T.O. Averrett et al.'' * [http://www.annualreviews.org/doi/abs/10.1146/annurev.nucl.47.1.67 SOLID POLARIZED TARGETS FOR NUCLEAR AND PARTICLE PHYSICS EXPERIMENTS], ''DG Crabb, W Meyer'' * [https://hallaweb.jlab.org/dvcslog/g2p/110412_205212/PhysRevLett.64.2627.pdf Proton Polarization in Irradiated Ammonia] ''DG Crabb et al.'' * [http://www.sciencedirect.com/science/article/pii/S0168900204005583 Observations of radiation damage and recovery in ammonia targets], ''P. McKee'' * [http://eproceedings.worldscinet.com/9789814324922/9789814324922_0018.html RADIATION DAMAGE AND RECOVERY IN POLARIZED 14NH3 AMMONIA TARGETS AT JEFFERSON LAB], ''J. Maxwell'' {div}