# Presentation: 657490

## Meson Test Beam UseErik RambergAEM, 28 Nov. ‘05

- Summary of MTBF user facility
- Beam types and rates
- Overview of approved and planned experiments

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

- Test beam coordinator:  Erik Ramberg - _[ramberg@fnal.gov](mailto:ramberg@fnal.gov)_ - 630-840-5731

## Scale:

- 2 beam enclosures, but cannot be operated independently.
- 6 user stations, with a 7th downstream of the beam dump.  An experiment can take up more than one station.
- 2 climate stabilized huts with air conditioning.
- 2 separate control rooms.
- Outside gas shed + inside gas delivery system brings 2 generic gas lines, 1 nitrogen line and 2 exhaust lines to each of the user areas
- Lockable work area with 3 offices for small scale staging or repairs, plus 2 open work areas.

- ~6 m

## Slide 4

## Operational Characteristics of Test Beam Line 

- 120 GeV protons impact on 40 cm long block of Aluminum as a production target.
- There are two operational modes of the test beamline:
- Proton Mode:  Tune beamline for 120 GeV protons that get transmitted through the target
- Secondary Mode: Vary the tune of the beamline according to the momentum desired.  Maximum momentum is 66 GeV while minimum momentum achieved so far is 3.7GeV.   Lower momenta are conceivable, but pion rate will be quite low and electron scattering will probably be quite high.
- Spot sizes can be made as small as 3-5 mm square (with 120 GeV protons) and as large as 5 cm square.

- Typical SWIC profiles while delivering 120 GeV beam  (1 mm wire spacing: ~ 7 mm RMS)

## Electrons at MTBF

- During the last run of the BTeV EMCAL group in June, the lead tungstate calorimeter was calibrated using MIP peaks.
- Momentum selected electrons were easily identified in the 4, 8, 16 and 33 GeV tunes.
- Improvements in the beamline (better vacuum and reduction of material) made for a better electron peak.
- The two Cerenkov detectors worked quite well and can participate in the trigger.

- 16 GeV tune

- 8 GeV tune

- 4 GeV tune

## Slide 7

## 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.
-  One 0.5 mm pitch MWPC and two 1.0 mm pitch MWPC into DAQ
- Three 1.0 mm pitch MWPC into the accelerator ACNET control system.
- DAQ accepts custom triggers and dead time veto. 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 is accessible to experimenters.  (Three bit event i.d. number is included in each event.)
- Experimenters can add their own trigger and deadtime signals.
- Rates on the order of 1 KHz have been achieved for the 4 second spill.

## MTBF Detectors                 

- Finger counters

- PWC

- Scint.

- SSD

- Swic

- MTBF Detectors

## One of the two beamline Cerenkov counters

- One of three MWPC stations

- Remote controlled scintillator finger counters

- Silicon tracker

## List of MTBF Memoranda of Understanding (MOU):

- _[T926: RICE](http://www-ppd.fnal.gov/mtbf-w/T926_mou.doc)_**   Experiment completed**
**T927: BTeV Pixel   Experiment completed**
**T930: BTeV Straw   Experiment completed**
**T931: BTeV Muon   Experiment completed**
**T932: Diamond Detector   Signed **
**T933: BTeV ECAL   Experiment completed**
**T935: BTeV RICH   Experiment completed**
**T936: US/CMS Forward Pixel  Taking data**
**T941: ****UIowa PPAC**** Test  Experiment completed**
**T943: U. Hawaii Monolithic Active Pixel Detector  Experiment completed**
_**T950: Vacuum Straw Tracker**_**   Taking data**
_**T951: ALICE EMCAL Prototype Test**_**   Taking data**
_**T953: U. Iowa Cerenkov Light Tests**_**   Signed**
_**T955: RPC Detector Tests**_**   In review**

## T950 Straw Tracker Test- Detector built at Fermilab for possible use at JPARC

## ALICE / PHENIX EMCal Test (T951) 

- Example of tracking output

- Electron peak, without and with Cerenkov signal.

- Lead/scintillator calorimeter modules on facility’s motion table.

## Possible future test beam initiatives

- Startup for T932 (diamond detector research), T953 (Cerenkov light tests) and T955 (RPC detector)
- Continuation of T936 (CMS pixel) and T950 (straw tracker)
- Jim Russ/CMU: silicon trackers for the LHC upgrade
- John Hauptman/Iowa State: dual readout calorimetry for the ILC
- Wojtek Dulinski/Strasbourg: irradiation tests for CMOS chip
- Victor Rykalin/NIU: extruded scintillator light yield
- Bob Abrams: ILC muon counters
- Mike Albrow: FP420 silicon tracking and timing counters
- Jae Yu/UTA: ILC calorimetry

## This proposal needed a long tem occupation (> 1 year) in MTBF.
They need a broad range of particle types (e,p)
Requests for high energy electrons (>25 GeV) andlow energy pions (1 GeV) can’t be met by current facility.  
Currently made plans to go to CERN SPS test beam for at least 2006.
Possible move to FNAL, but poor duty cycle, lower beam energy and VISA issues make our facility less convenient.

- This proposal needed a long tem occupation (> 1 year) in MTBF.
- They need a broad range of particle types (e,p)
- Requests for high energy electrons (>25 GeV) andlow energy pions (1 GeV) can’t be met by current facility.
- Currently made plans to go to CERN SPS test beam for at least 2006.
- Possible move to FNAL, but poor duty cycle, lower beam energy and VISA issues make our facility less convenient.

- An ILC test beam plan –34 institutions, ~160 names

- CALICE module test stand

## Summary

- The Fermilab Meson Test Beam Facility is in full operation and supporting multiple users throughout the year.
- It can deliver approximately 100KHz of 120 GeV protons during the 4 second spill, which comes every 2 minutes.
- We can also tune between 4-66 GeV, with about 100 Hz of electrons between 4 and 16 GeV.
- A multiple station tracking system and DAQ has been developed and was used to good effect by several users.
- There are modest requests for the foreseeable future.
- Any long term installation of ILC calorimetry has been postponed at least until CERN test beam is completed at the end of 2006.

## Spare slides

## Slide 18

## Multiple occupancy in test beam

- BTeV RICH test could identify multiple tracks in their detector as a function of gate width
- Multiples are on the order of 5% for 100 nsec gate width, rising up to about 35% for gate width of 1 sec
- These results have probably gotten better in the last six months, but this has not been tested.

## Meson Detector Building

- 40 cm Al target

## Beamline Cerenkov results

- p threshold

- p threshold

-  threshold

- 120 GeV

- 66 GeV

- scint

- CC 1

- CC 2

## Cerenkov results (cont)

-  threshold

- 16 GeV

-  threshold

- threshold

- 8 GeV

## Simulation of test beam rates

## Muons in MTBF

- Beam absorber between MT6A and MT6B is composed of two 4.5 ft sections of steel.
- With both sections in place, and 120 GeV beam incident, rate of muons at back of MT6B is ~10-6 p/cm2
- With only one section in place, and 120 GeV beam incident, rate of muons at back of MT6B is ~2 x 10-5 /p/cm2
- Results above have been verified behind last absorber as well.

- MT6A half absorber

- MT6B final absorber

## Location of Meson Test Beam Facility DAQ devices

**Control room**

**Electronics room**

**MT6B**

**MT6A**

- DAQ computer
- (mtbf.fnal.gov)

- CAMAC
-   crate 1

- CAMAC
-   crate 2

- CAMAC
-   crate 3

- CAMAC
-   crate 4

- CAMAC
-   crate 5

- MWPC

- MWPC

- MWPC

- Silicon

**MS4 Power Supply Service Area**