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Plans for Linear Collider Calorimetry Test Beam Work at Fermilab

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Title: Plans for Linear Collider Calorimetry Test Beam Work at Fermilab


1
Plans for Linear Collider Calorimetry Test Beam
Work at Fermilab
Andy White for U.S.European-CALICE and other
collaborators
2
Physics motivation/need
  • Unprecedented requirement for new level of
    hadron/jet energy resolution ?/E 30/?E
  • - Separation of W/Z in hadronic mode

60/?E
30/?E
3
How do we achieve this resolution?
  • Particle Flow Algorithm approach
  • High granularity calorimeter (transverse
    longitudinal)
  • Use excellent Pt resolution of tracker for
    charged tracks, measure photon energies in Ecal,
    and Ecal Hcal to measure neutral hadron
    energies

4
Critical Point !
PFA(s) development relies on MC detector
simulation gt MUST be able to verify MC
Calorimeter response over the ranges of energies
required and at high spatial resolution
Comparison of the shower radius in a hadronic
calorimeter as predicted by fifteen different MC
models of hadronic showers
5
Goals of Calorimeter Test Beam Program
Test MC modeling of detector response ? Test
detector technologies
6
Fermilab Meson Test Beam Facility
From E.Ramberg/LCWS 2004 Paris
7
Fermilab MTBF proton beam
From E.Ramberg/LCWS 2004 Paris
8
From E.Ramberg/LCWS 2004 Paris
9
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10
From E.Ramberg/LCWS 2004 Paris
One of the two beamline Cerenkov counters
One of three MWPC stations
Remote controlled scintillator finger counters
Silicon tracker
11
Operational Characteristics
  • There are several operational modes
  • Proton Mode Tune beamline for 120 GeV protons
    that get transmitted through the target. Rates
    at the user area are limited to 1 Mhz. Maximum
    rates so far are 200 KHz.
  • Secondary, or Pion Mode Vary the tune of the
    beamline according to the momentum desired.
    Maximum momentum is currently 66 GeV, with rates
    on the order of 10 kHz. Lowest momentum tune is
    on the order of 3-5 GeV. (See graph of
    calculated rates)
  • Muons By inserting a beam stop upstream, muons
    of tagged momentum less than 66 GeV can be
    delivered to both areas. By inserting the beam
    stop between the two user areas, muons of
    indeterminate momentum can be delivered to the
    downstream area. The former mode has not been
    tested. The latter mode has delivered 100 Hz of
    muons to the user area.
  • Electrons At low momentum (lt 5 GeV), the
    beamline delivers an enhanced electron fraction,
    at very low rates. There are intermediate target
    wheels and sweepers to attempt production of an
    electron beam at higher momentum. This mode has
    not been tested yet.
  • Fast extraction delivers from 20-80 buckets of 20
    nsec duration. Each bucket has 500 particles.
    Can insert beamstop to reduce rate to 0.5
    particle/bucket.
  • Resonant extraction delivers smooth beam over
    .4 sec spill. Spill can be made shorter down
    to 10 or 20 msec thus making more intense beam.
  • Spot sizes can be made as small as 3-5 mm square
    (with 120 GeV protons) and as large as 5 cm
    square.

From E.Ramberg/LCWS 2004 Paris
12
Components to be tested
  • Electromagnetic Calorimeter
  • Hadron Calorimeter
  • Integrated tail-catcher muon system

13
Electromagnetic calorimeters

Note Low energy e- tests planned at DESY late
2004
Silicon Tungsten CALICE,
SLAC/Oregon/BNL
14
Scintillator Tungsten U.Colorado,
Japan
15
Hybrid technologies (Si/Scint with W or Pb)
European (Como, Warsaw, LNF, Padova,
Trieste) Kansas/Kansas State
16
Hadron Calorimeters
Analog/Semi-Digital
CALICE
17
Digital Hadron
GEM-Steel UTA, U.Washington,
RPC-Steel ANL,BU, Chicago, FNAL, Iowa
18
Muon Detector/Tail Catchers
Scintillator-Steel US-European
RPC Frascati
19
Asian participation
  • Most of the linear collider test beam activities
    planned at Fermilab so far involve U.S. and
    European groups.
  • We would like to invite participation by more of
    our Asian colleagues.
  • The coordinator of test beam work is Jae Yu from
    the University of Texas at Arlington
  • jaehoonyu_at_uta.edu

20
Proposed test beam program
ECal e- - energy scans, 5 10
points (inc. DESY overlap) -
incident angle, 3 points - hadron
showers in ECal HCal and Tail-catcher
?, p energy scans, 1-66 GeV ( p -gt 120 GeV)
- incident angle scans
- ? - for tracking studies
21
CALICE HCAL movable test stand
  • Holds ECal HCal TC
  • 3-dimensional variation

22
Proposed test beam program
Combined runs (ECal HCal TC) e- - energy
scans, 5 10 points ?, p energy scans, 1-66
GeV ( p -gt 120 GeV) ? - tracking and calibration
23
Schedule of proposed activities
24
Conclusions
  • A test beam program to study showering in high
    granularity calorimetry and test new technologies
    is critically important for LC calorimetery.
  • Fermilab Meson Test Beam Facility is ready and
    available for LC calorimeter prototype tests.
  • Beam and other facility upgrades are being
    requested.
  • Several years of testing are foreseen and wider
    participation is actively encouraged!

25
Facility Detectors
  • Two beamline threshold Cerenkov counters can be
    operated independently for good particle i.d.
    (50 and 80 long)
  • Two stations of X,Y silicon strip detectors are
    installed.
  • Three 0.5 mm pitch MWPC into DAQ Three 1.0 mm
    pitch MWPC into the accelerator ACNET control
    system.
  • DAQ will be minimum bias triggered during the
    spill. The data from scintillators, Cerenkov
    counters, silicon and MWPC go into event buffers.
    Buffers are read out during and after the spill
    and this data will be accessible to
    experimenters.

From E.Ramberg/LCWS 2004 Paris
26
Predicted maximum rates in MT6 as a function of
momentum for pions and protons
kHz
GeV
27
List of MTBF Memoranda of Understanding
(MOU) T926 RICE - Took
data in Feb. T927 BTeV Pixel -
Taking data in Spring T930 BTeV Straw
- Taking data in Spring T931 BTeV Muon
- Install over Summer T932 Diamond
Detector - Taking data in Spring T933 BTeV
ECAL - Install over Summer T935
BTeV RICH - Install over
Summer T936 US/CMS Pixel - Taking data
in Spring
28
Status of Fermilab Test Beam
  • Several experiments have taken data or are
    currently doing so. Other experiments will be
    installing in the summer.
  • 120 Gev, 66 GeV and 33 GeV beams have been
    delivered. Both fast extraction and slow spill
    have been tested.
  • A low-rate, broad-band muon beam has been
    established
  • Tracking and DAQ near completion
  • Either fast spill (0.4-1.6 msec) or slow spill
    (.02-.6 sec)
  • Typical operation of 1 spill/minute. Can request
    higher rates.
  • 50 K protons/spill at 120 GeV
  • 3 K secondary beam/spill at 66 GeV
  • Lower momenta will give lower rates
  • Muon filters decrease beam by 10-3
  • Beam spot sizes of 3 mm square at 120 GeV

Summary of Operational Characteristics
(Beam rates have improved x5 since these
results)
29
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