16th March 200516th March 2005, ENG target, ENG target A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 11

Status of the TT2AStatus of the TT2Atarget experiment  target experiment 

A.FabichA.FabichCERN AB/ATBCERN AB/ATB

ENG/BENE meeting, CERN, 16ENG/BENE meeting, CERN, 16thth March 2005 March 2005

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 22

Approval StatusApproval Status

APPROVEDAPPROVED by the research board CERN by the research board CERN 2.Dec.2004: … The proposal was approved by the Research 2.Dec.2004: … The proposal was approved by the Research

Board, subject to further clarification of the resources …Board, subject to further clarification of the resources … 3.March 2005: fully approved (oral information)3.March 2005: fully approved (oral information)

CERN experiment database: CERN experiment database: http://greybook.cern.chhttp://greybook.cern.ch : : nToF11nToF11

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 33

SafetySafety

In close collaboration with Safety Commission (SC)In close collaboration with Safety Commission (SC)

No obstaclesNo obstacles

Hot issues (mercury, activation, …) evaluatedHot issues (mercury, activation, …) evaluated

Basic procedures and specifications defined for safe operationBasic procedures and specifications defined for safe operation

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 44

NOMINAL target testNOMINAL target test

Target: 1-cm diameter mercury jet, v=20 m/sTarget: 1-cm diameter mercury jet, v=20 m/s Proton beam: 24 GeV, <28x10Proton beam: 24 GeV, <28x101212 ppp, total of 100 pulses ppp, total of 100 pulses Meson capture: 15 Tesla solenoid field (pulsed)Meson capture: 15 Tesla solenoid field (pulsed)

Study …Study … proton induced shocksproton induced shocks Magneto-fluid-dynamicsMagneto-fluid-dynamics Secondary particle yieldSecondary particle yield

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 55

Mercury loop, targetMercury loop, targetPump Motor

CentrifugalPump w/MagneticCoupling

Hg Jet Containment

Sump Tank

Secondary Containment

Target Module

V.Graves, ORNL

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 66

Pump SystemsPump Systems

Hydraulic Pump, Reservoir,& Flow Control Valve

EM centrifugal pumpEM centrifugal pump

oror

Hydraulic piston pumpHydraulic piston pump

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 77

15 T pulsed solenoid15 T pulsed solenoid 33rdrd coil production completed coil production completed Integration into cryostat startsIntegration into cryostat starts Testing scheduled in summer 2005 at MITTesting scheduled in summer 2005 at MIT

P.Titus, MIT

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 88

… … on the beam lineon the beam line

Solenoid

ProtonBeam

Hg DeliverySystem

BeamAttenuator

V.Graves, ORNL

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 99

Cryogenic systemCryogenic system Base line scenarioBase line scenario

Final design dependent on Final design dependent on performance tests at MITperformance tests at MIT

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 1010

Power supplyPower supply

Reuse existing Reuse existing CERN power CERN power supplysupply

Previously used for extraction Previously used for extraction towards SPS West Areatowards SPS West Area

Rated: <900 V, <8kARated: <900 V, <8kA

Required: 740 V, 7.2 kARequired: 740 V, 7.2 kA

100 kChF for refurbishment and 100 kChF for refurbishment and installationinstallation

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 1111

TT2A PeripheryTT2A Periphery

A. Fabich

Equipment

Control Room

PS beam

ISRexperiment

Control room

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 1212

Primary ContainmentPrimary ContainmentHg Jet Z=0 Viewport

SecondaryContainment

PrimaryContainment

ProtonBeam

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 1313

Optical DiagnosticsRetro-reflected design, Optical high speed recording (<1 MHz)

One set of opticsper viewport

e-Drawing - Van Graves, ORNLe-Drawing - Van Graves, ORNL

T.Tsang, BNL

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 1414

Secondary particle yieldSecondary particle yield• momentum p = 24 GeV/c• 4 bunches within 8 PS buckets at our discretion• tpulse= 0.5-2 microseconds• tbunch=50ns full length, peak-to-peak 250 ns• < 7 TP per bunch, total intensity < 28 TP/pulse• spot size at target: <2 mm r.m.s.

Pump-Probe method for cavitation studies and secondary meson yield

16th March 200516th March 2005 A.Fabich, CERN AB/ATBA.Fabich, CERN AB/ATB 1515

Time scheduleTime schedule 20052005

MarchMarch nToF11 approvednToF11 approved SpringSpring solenoid construction completedsolenoid construction completed SummerSummer solenoid testssolenoid tests WinterWinter construction of Hg systemconstruction of Hg system

20062006 AprilApril solenoid test finishedsolenoid test finished JuneJune solenoid shipped to CERNsolenoid shipped to CERN autumnautumn integrated test at CERNintegrated test at CERN DecDec fully ready for beamfully ready for beam

20072007 AprilApril final run at PS start-upfinal run at PS start-up

Budget: ~2.5 M$