# Presentation: 359323

##                   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

##        www-ppd.fnal.gov/MTBF-w, or

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

## F17

- A0

- P3 beamline

- Transfer 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

## Slide 4

## Slide 5

## 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.

## SWIC profiles while delivering beam to RICE experiment T926

- (HV tripped off)

- Chamber at
- back of MT6B

## 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 minute
- But 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 spill

- Pbar extraction

## MI cycle time for pbar stacking

## 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.

## Slide 13

## 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](http://www-ppd.fnal.gov/mtbf-w/T926_mou.doc)_**   Signed**
**T927: BTeV Pixel   Signed**
**T930: BTeV Straw   Signed**
**T931: BTeV Muon   Signed**
**T932: Diamond Detector   Signed**
**T933: BTeV ECAL   In review by coordinator**
_**T935: BTeV RICH**_**  Signed**
_**T936: US/CMS Pixel**_**   ****Being rewritten**

## Status & Future

- Both operational modes for the Meson Test Beam Facility have been successfully run with fast extracted beam
- T926 (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