Overview

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

 

The polarized target system consists of 5 major subsystems:
  1. The cryogenic Evaporation Fridge is designed to provide high cooling power at 1 K.
  2. The CPI EIO (Extended Interaction Oscillator) is a microwave generator used in DNP.
  3. The Oxford Superconducting Magnet is vertically pointing split pair magnet needed for DNP.
  4. The Target Material is a frozen solid material with the necessary characteristics for nucleon polarization.
  5. The NMR (Nuclear Magnetic Resonance) system is needed to measure the polarization of the sample. 

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 (14,000 m3/hour).  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.

 

 

{div:class=arrow-link open-tab}

h2. Target Details

h4. [Introduction to the Drell-Yan PT]

h4. [Polarized Target Expert]

h4. [Polarized Target Operator]

h4. [System Photos]

h4. [Target Logbook]

h2. Polarized Target Training

[Polarized Target Summary]
[Anneal Summary]
[Target Operators]
[Target Troubleshooting]

h2. Target Training Information

Training for the Drell-Yan target operators will 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]

h2. 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)

h2. General Target Documents
[LabVIEW Virtual Instrument (VI) Manual | https://wiki.shanti.virginia.edu/display/SeaQuest/LabVIEW+Virtual+Instrument+%28VI%29+Manual]
[Microwave Generator Manual]
[Piping and Instrumentation Diagram]
[Hardware Manuals| https://twist.phys.virginia.edu/work/Drell-Yan/Manuals/]
[Cernox Target Insert Sensors]
[Target To Do List Before Fermilab]
[Target To Do List At Fermilab]
[Target To Get List (still needed equipment)]
[Request Service from Fermilab]
[Full Equipment List to be sent Fermilab]
[Parts List By Subsystem]
{div}