1. LOCATION

The tests are to be performed in the MTEST beam line in the MT6-B3 area on the motion table. The total length of the detectors along the beam is ~ 1.5m, including end effects. We will use Beam counters provided by facility as trigger and start time detector, or we have to put some beam counter upstream before the steel of hadron absorber.  

The experimenters need a support table on which to mount the detectors. This should allow horizontal and vertical scans of ~20cmx240cm , which would allow the detectors to be scanned and also to be moved out of the beam line in case there are other users downstream sharing the beam. If we can not scan the whole detector in full length and width, access may be needed to reposition the detector. The experimenters need a cable tray to carry the signal cables from the detector to the fast electronics control area. The experimenters will need some support to align the apparatus relative to the beam line. 

2. BEAM 

Type of Beam Needed:       pion or muon beam, proton beam also desirable

Intensity Needed:           <1KHz

Size of Beam needed:        1--10cm²

We would like to have nominal beam particle momentum ~5 GeV/c, and intensity <200Hz/cm². And at least one test at 50Hz/cm². We would also like to take a few data points at beam momentum of 1.5, 5, 10, and 20 GeV/c with and without thin (1.5m steel) absorber. And 120 GeV/c beam but with and without thick (3m steel) absorber. As long as we can identify the beam particle momentum and direction, the beam spot can be large (~10cm²).

BEAM SHARING:  Because of limited manpower availability and other commitments the experimenters will be unable to run continuously. These detectors could be moved sideways out of the beam.

3   RUNNING TIME and SCHEDULE  (Details See Fig 1.)

 (a)  Set up trigger scintillators and Cerenkov detectors timing in with MRPC detectors. It will be necessary to have scintillators or Cerenkov detectors (<100ps) upstream (before the absorber) to measure the Time-of-Flight and reject events from pion showers. We would like to ask for those from facility. This will provide us with trigger counters as well as start timing for MRPC.     

 (b)  With beam centrally through Cerenkov detectors, scan in HV, determine the optimal range/value for MRPC and wire chambers. 20 HV points.  

 (c)  With the HV set, scan vertically and horizontally (x-y scan) over steps of ~1cm. The experimenters would aim for 10,000 events (1% statistics) on a 1cm x 5cm grid. This will sample horizontally 30 data points and vertically 20 data points.  

 (d)  Gas composition from nominal Freon (95%)+ Isobutane (5%) to Freon (92%)+ Isobutane (5%)+SF6 (3%) and find the optimal HV range/value for MRPC.  

 (f)  With and without thin absorber, study muon beam efficiency and pion beam particle rejection. The beam particle momentum at 2, 5, 10 GeV/c.  

Fig 1:  T963 Test-Beam Schedule (See Updated)