Presentation is loading. Please wait.

Presentation is loading. Please wait.

Photon Tagging in the Hall D Beamline James McIntyre University of Connecticut 13 May 20101 GlueX Graduate Student Workshop Newport News, VA.

Published by Modified over 9 years ago

Similar presentations

Presentation on theme: "Photon Tagging in the Hall D Beamline James McIntyre University of Connecticut 13 May 20101 GlueX Graduate Student Workshop Newport News, VA."— Presentation transcript:

1 Photon Tagging in the Hall D Beamline James McIntyre University of Connecticut 13 May 20101 GlueX Graduate Student Workshop Newport News, VA

2 Outline How we tag photons Photon production Tagger Microscope – Components – Construction 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 2

3 Our interest is in determining the energy of the photons which produce an event in the target. The energy of an electron that produced (via bremsstrahlung) a photon of interest is measured so that the counterpart photon can be “tagged” with a correct energy. Things to consider: – Not all photons produced will create a usable event in the target. – Not all electrons will produce a photon. – Need a way to limit & filter accidental tags and noise from the data stream. Limiting – Occurs due to our design choices. Filtering – Statistically process the data stream. 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 3 Tagging

4 Photon Production As the electrons pass through the 20 µm diamond radiator photons can be produced via bremsstrahlung. The angle of deflection off the beamline varies. 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 4

5 Distance between the Tagger Microscope and Target is ~ 300 feet. Over such a large distance even small angles of deflection become considerable. 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 5 Hall D Beamline

6 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 6 ~97 Ft41 Ft~161 Ft~91 Ft Location of TargetLocation of Tagger Microscope Hall D Beamline e - Beam

7 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 7 e - Beam Tagger Magnet Tagger Area Photon Beam e - Beam

8 We can use the deflection to our advantage. – Use collimator to filter out photons that have large angles. – Use Scintillating Fibers (SciFi) size to our advantage. The electron which produced a photon with a large angle will also have a larger angle. Based on Monte Carlo simulations SciFi length and cross- sectional area was selected to provide optimum filtering of incoming electrons (along with other considerations). – 2 mm square multi-clad fibers – 2 cm long 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 8 Tagging

9 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 9 Tagging

10 Scintillating Fibers – Fast Green Scintillator (BCF – 20) – Decay time 2.7 ns Other faster fibers were considered but not chosen due to problems such as shadow signal after event, etc. Waveguide – BCF-98 – ~23 inches long per channel 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 10 Fiber Selection

11 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 11 Prototype of Tagger Microscope

12 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 12 Parallel Railing System Parallel Railing Unit

13 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 13 Ability to adjust bundle angle to permit alignment with electron beam. Step motors permit 3-point adjustment of railing height & angle (remotely).

14 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 14 Bundle Support Unit (aka Pop-Sickle Stick) 5x5 Bundle will mount on it via epoxy. Permits adjustment of bundle angle. Nuts on the underside of the rails will secure unit in place. Parallel Railing Unit

15 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 15 Fiber Array (Full Scale) Full Scale Tagger Microscope Fiber Array 500 Fibers 20 – 5x5 Fiber Bundles Note: Prototype will only have a single bundle (25 fibers) of which only 20 channels will be utilized. 5 horizontal rows Allow for proper alignment to the incoming beam by using all channels, then secure all except one row during the test runs. Provides longer operational lifetime, since radiation damaged fibers can be shifted via the step motors (instead of being changed out) to keep running using another viable row. 100 vertical rows Determines the amount of curvature of the electron due to the Tagger Magnet, therefore allowing us to calculate its energy and thus know the energy of the counterpart photon created during bremsstrahlung. End on view. The electrons would be going into the page.

16 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 16 Gluing Station Allows for close alignment of the two fibers Permits fine adjustment of the gap between the fibers Al construction allows for quicker curing on a heat plate Gap Adjustment Screw

17 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 17 Polishing: End-Mill to paper sanded Sanded fibers (400 grit) Straight edge when sanded (in contrast to the rounding shown above) Prep for Gluing (Old vs. New)

18 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 18 Glued Fiber

19 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 19 Painting Fibers Glued fiber joint showing light transmission. Air Gun used to paint the individual fibers after gluing.

20 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 20 Bundle of Fibers Glued fiber bundles (3x3 practice bundles) Foreground: Trial bundle with painted individual fibers. BC-600 epoxy was used. Background: Unpainted trial bundle using Elmer’ Glue. Tin Foil

21 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 21 Splicing Fibers MSU Splicing Unit Most promising way to connect SciFi to Waveguides As strong as a single fiber Quick production (once setup correctly) Uses a high intensity lamp to heat the fiber to the melting point and fuse them Was made for round fibers Need ferrule for square fibers to maintain shape during slicing Use of MSU Splicing Unit courtesy of Ron Richards

22 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 22 Digital Control Board Backplane Board Amplifier Board Electronics Backplane is secured to the top plate via six 6-32 machine screws. A Sponge Gasket provides a light seal for the penetration of the electronics. Not pictured – Card Guides and Chimney

23 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 23 Electronics Card Guide Backplane Board Chimney Waveguide SiPM Amplifier Board 96 Pin Euro Connector Amp Board Guard Amplifier Board Guard & Guides/Chimney Amp Board Guard protects SiPMs by preventing rubbing with the waveguides and other components. Card Guides/Chimney provide for alignment with respect to the waveguides, both vertical and horizontal. Designed to allow for ease of fiber mounting and removal.

24 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 24 Electronics Amp Board Guard SiPM Leveling strip

25 13 May 2010 GlueX Graduate Student Workshop Newport News, VA 25 Summary Measuring electron energy via deflection in a magnetic field Tagging photons Components of the Tagger Microscope

Download ppt "Photon Tagging in the Hall D Beamline James McIntyre University of Connecticut 13 May 20101 GlueX Graduate Student Workshop Newport News, VA."

Similar presentations

Overview of the GlueX Tagger and Photon Beamline..

Overview of the GlueX Tagger and Photon Beamline..
Beam Therapy Equipment 2 Linear Accelerator Head.

Beam Therapy Equipment 2 Linear Accelerator Head.
Collimation and tagging instrumentation for the GlueX photon beamline Richard Jones Igor Senderovich, Anne-Marie Carroll University of Connecticut APS/DNP.

Collimation and tagging instrumentation for the GlueX photon beamline Richard Jones Igor Senderovich, Anne-Marie Carroll University of Connecticut APS/DNP.
Beam test of the microscope prototype and active collimator preliminary report on the parasitic beam tests in Hall B April 2011 Richard Jones, Igor Senderovich,

Beam test of the microscope prototype and active collimator preliminary report on the parasitic beam tests in Hall B April 2011 Richard Jones, Igor Senderovich,
Chapter 17 The Grid So far we have discussed how kVp, patient size and collimation impact scatter radiation. As the part size and kVp increase, scatter.

Chapter 17 The Grid So far we have discussed how kVp, patient size and collimation impact scatter radiation. As the part size and kVp increase, scatter.
1 James M c Intyre. 2 Outline Overview  TAGM Milestones  Documents & Travelers  Personnel Training  Special Training & Hazards Construction Plan 

1 James M c Intyre. 2 Outline Overview  TAGM Milestones  Documents & Travelers  Personnel Training  Special Training & Hazards Construction Plan 
June Yong Yang, Nuclear physics site Mentor : Dr. Richard Jones.

June Yong Yang, Nuclear physics site Mentor : Dr. Richard Jones.
Yury CHESNOKOV Crystal Collimation workshop, March 7, 2005 CALIBRATION of CMS CALORIMETERS with LHC PROTON BEAM DEFLECTED BY CRYSTAL CALIBRATION of CMS.

Yury CHESNOKOV Crystal Collimation workshop, March 7, 2005 CALIBRATION of CMS CALORIMETERS with LHC PROTON BEAM DEFLECTED BY CRYSTAL CALIBRATION of CMS.
Hall D Photon Beam Simulation and Rates Part 1: photon beam line Part 2: tagger Richard Jones, University of Connecticut Hall D Beam Line and Tagger Review.

Hall D Photon Beam Simulation and Rates Part 1: photon beam line Part 2: tagger Richard Jones, University of Connecticut Hall D Beam Line and Tagger Review.
Upcoming Review of the Hall D Photon Beam and Tagger Richard Jones, University of Connecticut, for the GlueX collaboration GlueX Collaboration Meeting.

Upcoming Review of the Hall D Photon Beam and Tagger Richard Jones, University of Connecticut, for the GlueX collaboration GlueX Collaboration Meeting.
Microscope Performance at elevated dark rates Richard Jones University of Connecticut collaboration GlueX collaboration meeting, Newport News, Feb. 2-4,

Microscope Performance at elevated dark rates Richard Jones University of Connecticut collaboration GlueX collaboration meeting, Newport News, Feb. 2-4,
Tagger Microscope:  Performance Features Under Test Detector Alignment  Simulations show that when fiber axis is aligned to < 3 o of the e - trajectory.

Tagger Microscope:  Performance Features Under Test Detector Alignment  Simulations show that when fiber axis is aligned to < 3 o of the e - trajectory.
James M c Intyre University of Connecticut GlueX Collaboration Meeting JLab, Feb. 2-4, 2011.

James M c Intyre University of Connecticut GlueX Collaboration Meeting JLab, Feb. 2-4, 2011.
7 Oct 2011 Fall 2011 GlueX Collaboration Meeting Jefferson Lab Newport News, VA 1 Tagger Microscope (Top View) Tagger Magnet Photon Beam e - Beam.

7 Oct 2011 Fall 2011 GlueX Collaboration Meeting Jefferson Lab Newport News, VA 1 Tagger Microscope (Top View) Tagger Magnet Photon Beam e - Beam.
Abstract At the Thomas Jefferson National Accelerator Facility in Newport News, Virginia, a team of nuclear physicists has come up with a way to probe.

Abstract At the Thomas Jefferson National Accelerator Facility in Newport News, Virginia, a team of nuclear physicists has come up with a way to probe.
Active Collimator Test in Hall B Richard Jones, University of Connecticut, for the GlueX collaboration GlueX Collaboration Meeting September 18-20 2008,

Active Collimator Test in Hall B Richard Jones, University of Connecticut, for the GlueX collaboration GlueX Collaboration Meeting September ,
Beam Position Stabilization Using an Active Collimator in Hall D at Jefferson Lab Richard Jones, University of Connecticut, for the GlueX collaboration.

Beam Position Stabilization Using an Active Collimator in Hall D at Jefferson Lab Richard Jones, University of Connecticut, for the GlueX collaboration.
Tagger Electronics Part 1: tagger focal plane microscope Part 2: tagger fixed array Part 3: trigger and digitization Richard Jones, University of Connecticut.

Tagger Electronics Part 1: tagger focal plane microscope Part 2: tagger fixed array Part 3: trigger and digitization Richard Jones, University of Connecticut.
GlueX Luminosity Limits Richard Jones, University of Connecticut GlueX Collaboration Meeting, Newport News, May 8-10, 2008 1.Design luminosity 2.Physics.

GlueX Luminosity Limits Richard Jones, University of Connecticut GlueX Collaboration Meeting, Newport News, May 8-10, Design luminosity 2.Physics.
Silicon Photomultiplier Readout Electronics for the GlueX Tagger Microscope Hall D Electronics Meeting, Newport News, Oct. 23-24, 2007 Richard Jones, Igor.

Silicon Photomultiplier Readout Electronics for the GlueX Tagger Microscope Hall D Electronics Meeting, Newport News, Oct , 2007 Richard Jones, Igor.

Similar presentations

Ads by Google