The Meson Test Beam Facility

Erik Ramberg LRP Meeting – Oct. 30,2003

Delivering MI beam to MTBF User area layout Operational characteristics Detectors Current test beam MOU’s

Web page for MTBF: www-ppd.fnal.gov/MTBF-w, or Fermilab-at-Work MTBF

F17

A0

P3 beamlineTransfer Hall

Enclosure B

Hall C

SY120 Project:- Delivering MI Beam to Meson Detector Building- 2.5 km extraction beamline (longest in world?)-~40 magnets replaced in left bends in Hall C

Operational Characteristics

There are two operational modes: Proton Mode: We tune all bend magnets for 120

GeV. To reduce flux in user areas, we have to turn off focusing quadrupoles and insert pinhole collimator. Rates will be on the order of 700 kHz.

Secondary, or ‘Pion’ Mode: We will vary the tune of the bend magnets according to momentum needed. Quads will be in focusing mode and pinhole collimator will be out. Maximum momentum will be 80 GeV, with rates on the order of 50 kHz.. Lowest momentum tune is on the order of 3-5 GeV.

Beamline has secondary targets and sweepers to tune for electrons, but lore indicates that better electron flux can be obtained by just tuning for low momentum and using particle i.d. Beamstop between MT6A and MT6B can filter for muons in the second user area. An upstream beam stop can be used to select for muons in both areas.Spot sizes can probably be made as small as 3-5 mm square and as large as 5 cm square.

(HV tripped off)

Chamber atback of MT6B

SWIC profiles while delivering beam to RICE experiment T926

Positive Particle Rate

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0 20 40 60 80 100 120

pion

proton

Total

Predicted rates in MT6 as a function of momentum for pions and protons

Duty Factor in SY120

Program planning has determined that SY120 operations will affect pbar production by less than 5%Start off with 700 msec slow spill every minuteBut ramps will be set so that pbar extraction and resonant extraction can coexist in a single spill:

MI cycle time 2.78 sec / Total 3.25 sec

700 ms spillPbar extraction

MI cycle time for pbar stacking

time

$29

cycl

es in

60

sec.

2.4 s

2.2 s

pbar stack size

3 s

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.

One of the two beamline Cerenkov counters

One of three MWPC stations

Remote controlled scintillator finger counters

Silicon trackers

T926: Radio Ice Cerenkov Experiment

T927: BTeV Pixel Test

Experiments planned :• CKM Straws+Cerenkov (Spring, 2004)• Linear Collider detectors (2004-5?)• DONUT emulsion stack test (?)• Off-axis neutrino detectors (?) • … many other verbal contacts

List of MTBF Memoranda of Understanding (MOU):

T926: RICE SignedT927: BTeV Pixel SignedT930: BTeV Straw SignedT931: BTeV Muon SignedT932: Diamond Detector SignedT933: BTeV ECAL In review by coordinatorT935: BTeV RICH SignedT936: US/CMS Pixel Being rewritten

Status & FutureBoth operational modes for the Meson Test Beam Facility have been successfully run with fast extracted beamT926 (RICE) will continue their experiment with fast extraction.At the same time, we will attempt to get slow resonant extraction working for T927 (BTeV Pixel)Installation of several other experiments are planned in Dec., Jan. Feb.Tracking, particle I.D. and DAQ will be used to characterize test beam Eventually, we should concentrate on improving electron production