DOE SITE VISIT 2002

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DOE SITE VISIT 2002
TASK B1 OVERVIEW Y.ONEL
I) E781 II) CMS FORWARD CALORIMETRY
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TEAM MEMBERS WHO CONTRIBUTED TO I or/and II
U.AKGUN, GRADUATE STUDENT S.AYAN, GRADUATE
STUDENT P.BRUECKNEN, QUARK-NET TEACHER M.KAYA,
GRADUATE STUDENT (Ph.D 2001, Asst. Prof., Kars
University, Turkey) E.MCCLIMENT, PROFESSOR J.P.
MERLO, PROJECT RESEARCH ASSOCIATE M.MILLER,
ELECTRONICS ENGINEER K.NELSON, GRADUATE STUDENT
(Ph.D 1999, University of Alabama) Y.ONEL,
PROFESSOR S.OZKORUCUKLU, GRADUATE STUDENT (Ph.D
2001, Asst. Prof., S.Demirel University,
Turkey) P.POGODIN, GRADUATE STUDENT (Ph.D.
1999, Sun Computer Systems, California)
I.SCHMIDT, MECHANICAL ENGINEER A.TAUKE,
UNDERGRADUATE PRESIDENTIAL SCHOLAR (U of
California, Santa Barbara)
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NEW TEAM MEMBERS

• Alexi Mestvirishvili Perugia, Italy/CERN
• Ed Norbeck CMS Heavy Ions
• Chris Like Quarknet Teacher
• Ron Newland Quarknet Teacher
• Firdevs Duru Graduate Student
• Jonathan Olson Senior Undergrad Student
• Warren Clarida Undergraduate Student
• Tyler Huebner Undergraduate Student
• John Mulherin Undergraduate Student

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?c ?c0 Search in E781 Selex Experiment

Currently ?- ? ? and ? K-? decay channels
for ?c, ? -?and ? -?- ? ? decay channels for
?c0 are being studied. Lifetime calculations will
be made for these events.
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?c0 Search in E781 Selex Experiment

Currently ?-K- ? ? and ? K- K- ? decay
channels are being studied. ?-?and ?-?- ? ?
channels will also be investigated.
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II) CMS - HF

• IOWA HAS MAJOR MANAGEMENT AND CONSTRUCTION
  RESPONSIBILITIES IN THE CMS HF AND HB.
• MOU'S ARE SIGNED BETWEEN FERMILAB AND UI
• SOW'S ARE PREPARED FOR EACH YEAR USING LEHMAN
  APPROVED PROJECT FILES (MPO'S)
• Y.ONEL U.S COORDINATOR, USCMS EXEC.BOARD MEMBER
  AND PROJECT MANAGER FOR PHOTODETECTORS L3
• SEVERAL PROTOTYPES HAVE BEEN BUILT AT IOWA PRIOR
  TO PPP1 EM 96, RADDAM 98

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• CMS HF PPP1 AT IOWA AND CERN
• TEST BEAM FY00 ( SEVEN IOWA TEAM MEMBERS
  PARTICIPATED) INTERNATIONAL MILESTONE
• HF PRR FOR PMT AND FIBERS
• HF EDR MARCH 2001
• HF ABSORBER PRODUCTION IN OCTOBER 2001
• HF PROCUREMENT FOR PMT AND FIBERS BEGAN
  NOVEMBER 2001 (INTERNATIONAL MILESTONES)
• HF NEW SCHEDULE
• HF UI RESPONSIBILITIES (HF PHOTODETECTORS,
  INCLUDING PMT OPTICAL TEST STATION CONSTRUCTION
  AND TESTING, HF CALIBRATION SYSTEM (LED,
  SOURCE), HB LED, (1/2)HF OPTICS, (FIBERS QP),
  RADIATION DAMAGE, INTERGRATION ENGINEERING, AND
  INTERNATIONAL RELATIONS AND PHYSICS AND TRIGGER
  SIMULATIONS)

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Why HF?

• Covers the pseudorapidity range 3-5
• HF psedorapidity range 4.5-5 will get
  100Mrad/year. Therefore the detector should be
  able to withstand this exceptionally high
  radiation field.
• Two main objectives
• To improve the measurement of the missing
  transverse energy EmissT
• To enable identification and reconstruction of
  very forward jets

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HCAL - ? Coverage
(A.Nikitenko)
HF needed for tag jets, missing ET and jet vetoes
(SUSY)
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HF PPP1 Side View
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HF Fiber Spacing (PPP1)
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HF status

• Project
• Construction status
• Test beam
• Schedule

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Strongback and backplane production

• Contract signed with Turkish firm in December
  2001.
• First 9 strongbacks and 6 backplanes delivered
  geometry verified by mounting the first 9 wedges
  on a jig simulatingthe geometry of final
  shield.
• Expect complete delivery
• December 2002

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Read Out / Optics
2 boxes built plan to use them in Test beam
PM Base Sockets (Iowa)
Light Guides (Iowa)
Mu-Metal (Iowa)
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Fiber stuffing
New Task for Iowa Ianos Schmidt (CMS Fiber
Insertion Coordinator)
Source tubes insertion
Fiber bundles preparation
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Source Tube Assembly
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CMS-HF PMT Test and Quality Control System

• U. Akgun1, A.S. Ayan1, F. Duru1, E. Gulmez2,
• M. Miller1, J. Olson1
• Y. Onel1, I. Schmidt1
• with Quarknet Group P. Bruecken, C. Like, R.
  Newland

1 University of Iowa, Iowa City, USA 2 Bogazici
University, Istanbul, Turkey
Abstract We have measured the specifications
proposed by the CMS-HCAL committee on the
candidate phototubes from the three major
manufacturers Hamamatsu, EMI and Photonis. In
this report, we present the results from those
measurements and we outline the future
measurements for the test and the quality control
as well as the design of the new University of
Iowa PMT test station facility.
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Tasks of the Test System

• For one tube in every batch
• Double-pulse linearity,
• Gain vs HV for each batch
• Single photoelectron spectrum
• X-Y scan (spatial uniformity)
• Lifetime
•  
• For each tube
• Pulse width
• Pulse rise time
• Transit time
• Transit time spread
• Anode dark current
• Relative gain coupled with cathode sensitivity,
• Pulse linearity
• Quality control decision on each tube.

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Light source through Fiber for Light guide test
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UNIVERSITY of IOWA PMT TEST STATION
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XY Uniformity
XY Uniformity, Dark Current, Relative Gain
8 channel pico-ammeter
Pinhole Mask
32 channel Voltage ADC
Motor Controller
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LabVIEW software
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PMT Data (1550 PMTs)
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PMT Web Database
Sort by column (Ascending or Descending)
Alternating colors to aid readability
Pagination reference for large data sets
More extensive search/sort options are being
developed
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Iowa LED Pulser Characteristics

• Pulser located at LED
• Pulser operates from 5.5 Volts and ground
• Output pulse of 5.5 Volts
• Circuit utilizes all bipolar devices
• Rise and fall times less than 6 nanoseconds
• Electrical pulse duration from 10 nanoseconds to
  1 microsecond
• Circuit may be easily modified to drive multiple
  LEDs to achieve greater optical signal
• Signal amplitude is adjusted by varying LED
  cathode potential

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Pulser in Calibration Unit
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Test of CMS_HF Light Guide System at Iowa PMT
Test Station

• A. Ayan, U. Akgun, E. Gulmez, A.
  Mestvirishvili, M. Miller, J. Olson, Y. Onel,
  I. Schmidt
• University of Iowa, Iowa City, Iowa, USA
• Bogazici University, Istanbul, Turkey

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Light Guide Milling
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HF Wedge Test Beam 2002 Iowa Analysis

• Ahmet Sedat Ayan
• University of Iowa
• Dept. of Physics Astronomy

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Test beam setup
Iron shield
Two HF wedges Four data taking conditions-Perpen
dicular to beam-Inclined by 6o
horizontally-Inclined by 4o vertically-Modules
turned by 90 degrees to scan along the side
Muon tagger
Delay Wire Chambers Resolution 200 mm
Trigger counters
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Electromagnetic energy resolution by positrons
after light-guide intervention

• The installed light guide reflector elongated by
  15mm.
• The the constant term of electromagnetic
  resolution improves to 188. !!!

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Scan by 50GeV electrons

• T15, EM fibers.
• Beam particle hit position cut by 0.25x0.25mm
  squares.

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Hadronic energy resolution by pions

• T15, EM fibers.
• Gaussian fit to signal
• Used sigma (?) and mean ?(E) of fit.
• ?/E?20

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Schedule
Conclusion HF is well on schedule and stays
clear of CMS critical path
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Quarknet 2002

• Iowa hosted a summer institute for high school
  teachers in July
• 28 high school teacher participation
• (3 week session)
• CMS summer research
• Peter Bruecken Bettendorf High teacher
• Ben Bettendorf High student
• Aaron Sartor Bettendorf High student
• Beth Takamoto Bettendorf High student

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Quarknet 2002 CMS Summer Research
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TIER-2 Pilot Program

• Building Collaborative Environments for
  Grid- based CMS LHC Analysis
• Iowa is funding a pilot program for CMS TIER-2
• Competing for intra-university grant
• Test bed for CMS