Recent Activity at the Upgraded Test Beam Facility Erik Ramberg AEM 16 April, 2007 Open House and ILC Workshop New Test Beamline Layout and Performance Particle I.D. in the Beam Experimental Area Resources Current and Future Experiments in the Test Beam Facility

Test Beam Facility Open House on January 12,2007: ILC Detector Test Beam Workshop on January To celebrate new test beamline: Many thanks to the hard work of the AD, who made the new beamline possible (See Chuck Brown’s AEM talk on March 5) Many thanks to the hard work of the AD, who made the new beamline possible (See Chuck Brown’s AEM talk on March 5)

Meson Test Beam Facility Current 40 cm Al target New 30 cm target location MTest pion beam MCenter MIPP beam MTest Beam Layout and Modes Proton Mode: 120 GeV protons transmitted through upstrm target Pion Mode: 8-66 GeV beam tuned for secondaries from upstrm target Low Energy Pion Mode: 1-32 GeV beam tuned for secondaries from new dnstrm target

New Beamline Layout Movable target Absorber Dump Momentum Collimator Area for particle i.d. (differential CKov, threshold CKov, TOF) e- target wheels now in high intensity primary beam Long straight section for muon production 2 sets of quad triplets

Measured rates in the MTBF beamline Tune (GeV)Rate in MT6/spill*e - fraction Resolution , ** 90, , % 1.0 % 16 14, % 1.2 % 8 5, % % 2.4 % 16*** 72, % 5 % 8 44, % 5 % 4 27, , ,000 *(Rates are normalized to 2.4E12 protons in Main Injector) **(Rates in green are for pion mode) ***(Rates in red are for low energy pion mode. These rates can improve x20 with upstream target removal.)

Low energy supplies and Hall probes have just now been completely installed. Plans are proceeding to make the upstream target movable out of the beamline for the Low Energy mode. This will increase fluxes significantly. Electron target wheels have not been tried yet Muon tuning has not been tried yet New movable fiber plane beam profile monitors have been installed:

Finger countersPWCTOFSwicCerenkovs Detectors

Setup of Meson Test Beam Facility tracking DAQ Control room Electronics room MT6B MT6A DAQ computer (mtbf.fnal.gov) CAMAC crate 1 crate 3crate 4crate 5crate 7 MWPC MS4 Power Supply Service Area CAMAC data acquisition is no longer supported at Fermilab. Should this high speed (1.5 kHz), high density (1400 channels) system be replaced? If so, its current capabilities should not be compromised.

Using the tracking system to monitor the beam The 4 station tracking system has a total of 20 planes of wires, each plane with 64 wires of 1 mm spacing. Peter Cooper has analyzed data to determine the characteristics of the beam The tracking code gives 50% efficiency, 120 micron pointing accuracy and 30 microradian resolution. At 120 GeV: beam width is 2-3 mm RMS, and divergence is about 200 microradians At 8 GeV: beam width is 16 mm RMS, and divergence is microradians

Particle I.D. at the test beam Two large scintillator hodoscopes have 4 PMT’s on each one. Separation of about 30 meters allows for time-of- flight measurements on beam less than 4 GeV: There are 2 Cerenkov detectors at the end of the beamline. Both are currently threshold. One will be converted into differential. Gas control system is based on MIPP’s design - excellent!

Composition of the beam: At 16 GeV - –20% positrons –2-5% muons –45-50% pions –30% protons At 8 GeV - –30% positrons –10-15% muons –15-20% pions –30-40% protons Can we purify these beams by mistuning two sections of the beamline? This is promising, but hasn’t been tried yet.

MTEST Weekly Schedule Dates ExperimentDescription Jan Turn-onRestart program Feb. 1-20TuningLow energy tuning Feb. 21T953Cerenkov Cal. Mar Open for tour Mar. 7T958Fast Timing Mar. 14T958Fast Timing Mar. 21T950/T964Straw Tubes/GEMs Mar. 28T965Photosensor Apr. 4T964ILC GEMs Apr. 18T967g-2 Calorimeter Apr. 25TuningLow energy tuning May 2T963RHIC STAR May 9T963RHIC STAR July 11T958Fast Timing

Time Resolutions: Resolutions are obtained as differences between pairs of bars to eliminate the jitter of the stop signal Including information from several bars we improve the resolution of the time measurement. QBC-QBD. 109ps. QBD,E,Gvs.QBC. 62ps. (0.4*QBD+0.4*QBE+0.2*QBG)-QBC 62ps-> 44 pse 109ps-> 75 ps/bar T958 Data Analysis (Preliminary) Using information from 4 bars lowers effective resolution from 75 psec to 44 psec.

120GeV Proton – Triggered pad & Neighbor, X-Talk measurement Pad 15 – Center pad Pad 7 – immediate neighbor Includes charge sharing events Preliminary data from T964 - ILC GEM Detectors

Resolution shown is approximately microns. These results were obtained from a previous run with only 3 stations of MWPC in the facility. We added a 4th station to get 120 micron resolution and this group took data for a solid week at 8 GeV. T950 Straw Tracker Test - Detector built at Fermilab for possible use at JPARC - Tested using the facility MWPC tracking system

T965 TEST WITH 120 GeV PROTONS PSiPs mounted

MPPC : CHARGE SPECTRUM (MIP) PRELIMINARY

TCMT cassette at MTBF Portions of CALICE, including the T957 NIU TCMT system, and the GEMS from T964, are planning a ‘slice test’ at Fermilab sometime this summer CALICE (integrated calorimetery for ILC) has stated a goal of bringing their large scale motion table to the Test Beam Facility in November. MINERVA would like to test their large scale prototype in the test beam during Spring, COUPP plans a scattering experiment this summer Future experiments Two BNL experiments (STAR and g- 2) are bringing devices to test in the next couple of weeks. T966, under direction of Marco Batagglia of LBL, will be bringing CMOS pixel sensors to the test beam sometime this summer

Tail Catcher ECAL HCAL Electronic Racks Beam Example of CALICE Setup at MTBF

PHENIX wafer contains 6 “1x8” and 2 “1x4” sensors 1x8 will be used by PHENIX 1x4 will be used for test beam Half-plane = three 1x4 modules read out by 1 FPGA Station = two half planes offset by active area of sensor 2 stations upstream of DUT & 2 downstream (precision x & precision y) The Future: A New test beam pixel telescope

Summary About 8 months ago, Fermilab initiated a significant investment in the Meson Test Beam Facility. As a consequence of this investment, both the beamline and user facilities were improved considerably over the last few years of running. The beamline improvements include: –An intermediate moveable target which will increase low energy pion flux –Low current power supplies and Hall probes to stabilize low energy tuning –Minimization of material in the beamline to reduce scattering and conversion –Ability to bring primary proton beam flux on an electron target –Quadrupole triplets to enhance tuning. The user facility improvements include: –Thorough cable installation –New control/conference room –4th tracking station –New TOF system and Cerenkov detectors –Motion tables and video system –Laser alignment

The beamline is still undergoing some commissioning, with emphasis on low energy tuning, using the new low energy supplies. It is performing very well and we will improve its performance in the coming months. 5 experiments have taken data already this year. 3 more are scheduled. Several other major installations will be competing for space and time within the next year. The extremely versatile beamline and significant user support makes this beamline very attractive to the world community.