meg beam line studies
DESCRIPTION
MEG Beam Line Studies. E5 Z-Branch NOW !!!. Topics to be Addressed. Summary of Status at the time of the last Review Current Component Status Summary/Conclusions Beam Line Schedule. Summary Status (Review July 2003). Beam Line Milestone just achieved – - PowerPoint PPT PresentationTRANSCRIPT
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 11
MEG Beam Line StudiesMEG Beam Line Studies
E5 Z-BranchE5 Z-Branch NOW !!!NOW !!!
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 22
Topics to be AddressedTopics to be Addressed
• Summary of Status at the time of the last ReviewSummary of Status at the time of the last Review
• Current Component StatusCurrent Component Status
• Summary/ConclusionsSummary/Conclusions
• Beam Line ScheduleBeam Line Schedule
• Summary of Status at the time of the last ReviewSummary of Status at the time of the last Review
• Current Component StatusCurrent Component Status
• Summary/ConclusionsSummary/Conclusions
• Beam Line ScheduleBeam Line Schedule
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 33
Summary Status (Review July Summary Status (Review July 2003)2003)
• Beam Line Milestone just achievedBeam Line Milestone just achieved – – Successful test of optics up to point of injection into COBRA Solenoid Successful test of optics up to point of injection into COBRA Solenoid As well as beam propertiesAs well as beam properties (Phase Space, Stopping rate, Separation Quality, etc.)(Phase Space, Stopping rate, Separation Quality, etc.) matching the proposed valuesmatching the proposed values … … using temporary components !!!using temporary components !!!
Triplet I Separator II Triplet II PSC-SolenoidTriplet I Separator II Triplet II PSC-Solenoidin: Nov. 2002 Defect !!! most Last Run Temporary Temporaryin: Nov. 2002 Defect !!! most Last Run Temporary Temporaryout: Jun. 2003 out: Jun. 2003 out: Jun. 2003 out: Jun. 2003 out: Jun. 2003 out: Jun. 2003 out: Jun. 2003 out: Jun. 2003 -> LEM -> New -> Shorter -> Too Short Bore too small-> LEM -> New -> Shorter -> Too Short Bore too small
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 44
Summary Status (Review July 2003) – Summary Status (Review July 2003) – cont.cont.
• Beam Transport SolenoidBeam Transport Solenoid BTS - BTS - under studyunder study estimated earliest delivery …early summer 2004estimated earliest delivery …early summer 2004
• LNLN2 2 + LHe transfer Lines+ LHe transfer Lines under discussionunder discussion
• Remaining Beam ElementsRemaining Beam Elements - - under discussion under discussion
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 55
Current Component Status – Triplet I + Current Component Status – Triplet I + SeparatorSeparator
• Triplet I: Triplet I:
- - QSB Quadrupole magnetsQSB Quadrupole magnets being removed being removed during re-build of during re-build of µµE4 AreaE4 Area during during current Shutdown, will be assembled current Shutdown, will be assembled as tripletas triplet
- - WagonWagon for triplet being constructed fromfor triplet being constructed from lower-part of shielding wagonlower-part of shielding wagon
- - High Acceptance +-slit Vacuum ChamberHigh Acceptance +-slit Vacuum Chamber under designunder design
Insertion Shutdown 2004 (~April)Insertion Shutdown 2004 (~April)
• Triplet I: Triplet I:
- - QSB Quadrupole magnetsQSB Quadrupole magnets being removed being removed during re-build of during re-build of µµE4 AreaE4 Area during during current Shutdown, will be assembled current Shutdown, will be assembled as tripletas triplet
- - WagonWagon for triplet being constructed fromfor triplet being constructed from lower-part of shielding wagonlower-part of shielding wagon
- - High Acceptance +-slit Vacuum ChamberHigh Acceptance +-slit Vacuum Chamber under designunder design
Insertion Shutdown 2004 (~April)Insertion Shutdown 2004 (~April)
• Separator :Separator :- - New Vertical Separator New Vertical Separator was approved for MEG was approved for MEG design underway & HV-parts ordered or delivereddesign underway & HV-parts ordered or delivered
not expected before October 2004 !!!not expected before October 2004 !!!
• Separator :Separator :- - New Vertical Separator New Vertical Separator was approved for MEG was approved for MEG design underway & HV-parts ordered or delivereddesign underway & HV-parts ordered or delivered
not expected before October 2004 !!!not expected before October 2004 !!!
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 66
Current Component Status – Triplet II + Current Component Status – Triplet II + BTSBTS
• Triplet II:Triplet II: -- QSK Triplet + VacuumQSK Triplet + Vacuum Chamber removed from Chamber removed from µµE4 beam line E4 beam line
during current shutdownduring current shutdown Available after shutdown 2004 (April)Available after shutdown 2004 (April)
• Triplet II:Triplet II: -- QSK Triplet + VacuumQSK Triplet + Vacuum Chamber removed from Chamber removed from µµE4 beam line E4 beam line
during current shutdownduring current shutdown Available after shutdown 2004 (April)Available after shutdown 2004 (April)
• Beam Transport Solenoid BTS:Beam Transport Solenoid BTS: - New superconducting solenoid which - New superconducting solenoid which replaces PSC-test Sol. used in Beam Testsreplaces PSC-test Sol. used in Beam Tests
-- Delayed !!! – due toDelayed !!! – due to
(i)(i) COBRA coupling problems more COBRA coupling problems more complexcomplex than envisagedthan envisaged
(ii) non-negligible amount of time (ii) non-negligible amount of time invested in beam & detector setupinvested in beam & detector setup simulation for LXe Large Prototype simulation for LXe Large Prototype test in test in 1 Oct.1 Oct. end Dec.2003 end Dec.2003
• Beam Transport Solenoid BTS:Beam Transport Solenoid BTS: - New superconducting solenoid which - New superconducting solenoid which replaces PSC-test Sol. used in Beam Testsreplaces PSC-test Sol. used in Beam Tests
-- Delayed !!! – due toDelayed !!! – due to
(i)(i) COBRA coupling problems more COBRA coupling problems more complexcomplex than envisagedthan envisaged
(ii) non-negligible amount of time (ii) non-negligible amount of time invested in beam & detector setupinvested in beam & detector setup simulation for LXe Large Prototype simulation for LXe Large Prototype test in test in 1 Oct.1 Oct. end Dec.2003 end Dec.2003
BTSBTSCOBRACOBRA
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 77
Current Component Status – BTS Current Component Status – BTS cont.cont.
BTS – Complications:BTS – Complications:(i)(i) focusing optics at Collimator found focusing optics at Collimator found to be to be v. sensitivev. sensitive to to STRAY FIELDSTRAY FIELD solenoid excitation curvesolenoid excitation curve DESTROYED DESTROYED if Bfieldif Bfield TOO LARGE TOO LARGE
50% of Stray Field from COBRA 50% of Stray Field from COBRA 5m away !!!5m away !!! Compensation Coil Needed Compensation Coil Needed
upstream of BTSupstream of BTS under Design…under Design…
BTS – Complications:BTS – Complications:(i)(i) focusing optics at Collimator found focusing optics at Collimator found to be to be v. sensitivev. sensitive to to STRAY FIELDSTRAY FIELD solenoid excitation curvesolenoid excitation curve DESTROYED DESTROYED if Bfieldif Bfield TOO LARGE TOO LARGE
50% of Stray Field from COBRA 50% of Stray Field from COBRA 5m away !!!5m away !!! Compensation Coil Needed Compensation Coil Needed
upstream of BTSupstream of BTS under Design…under Design…
Triplet 2Triplet 2Triplet 2Triplet 2
1111
SolenoidSolenoidSolenoidSolenoidWIENWIENWIENWIEN
FilterFilterFilterFilter
ColliColli..ColliColli..TripTrip..TripTrip..
µµ++µµ++
ee++ee++ee++ee++µµ++µµ++
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 88
Current Component Status – BTS cont.Current Component Status – BTS cont.
Modified COBRA Axial Bfield
0.00
0.10
0.20
0.30
0.40
0.50
0.60
125 145 165 185 205 225 245 265 285
Axial Distance from COBRA centre {cm}
Axi
al B
fiel
d
{T}
COBRA Bfield
COBRA(+)Tran SOL(+)
Trans. Sol.
COBRA(+)Tran Sol(-)
BTS – Complications:BTS – Complications:
(ii) (ii) Requirements:Requirements: - BTS Bfield must have min. influence - BTS Bfield must have min. influence on COBRA field in fiducial regionon COBRA field in fiducial region- Min. beam-spot size at TargetMin. beam-spot size at Target contradictory!!!contradictory!!! Only free parameters (coupled):Only free parameters (coupled): BBBTSBTS & & ΔΔLLCOBRA-BTSCOBRA-BTS
Focus also dependent on how split Focus also dependent on how split degrader (M.S. vs. Background)degrader (M.S. vs. Background)
Full Simulation underway:Full Simulation underway: TRANSPORT, TURTLE, Track TRANSPORT, TURTLE, Track Optics Optics GEANT GEANT spot-size, resolution spot-size, resolution ANSYS ANSYS Magnetic influenceMagnetic influence
Delivery BTS not before ~Nov. 2004Delivery BTS not before ~Nov. 2004
BTS – Complications:BTS – Complications:
(ii) (ii) Requirements:Requirements: - BTS Bfield must have min. influence - BTS Bfield must have min. influence on COBRA field in fiducial regionon COBRA field in fiducial region- Min. beam-spot size at TargetMin. beam-spot size at Target contradictory!!!contradictory!!! Only free parameters (coupled):Only free parameters (coupled): BBBTSBTS & & ΔΔLLCOBRA-BTSCOBRA-BTS
Focus also dependent on how split Focus also dependent on how split degrader (M.S. vs. Background)degrader (M.S. vs. Background)
Full Simulation underway:Full Simulation underway: TRANSPORT, TURTLE, Track TRANSPORT, TURTLE, Track Optics Optics GEANT GEANT spot-size, resolution spot-size, resolution ANSYS ANSYS Magnetic influenceMagnetic influence
Delivery BTS not before ~Nov. 2004Delivery BTS not before ~Nov. 2004
BTSI
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
BTSH
3.418
COBR
5.071
COBR
5.564
COBR
6.036
COBR
6.471
COBR
6.861
COBR
7.200
COBR
7.488
COBR
7.727
COBR
7.923
COBR
8.082
COBR
8.212
COBR
8.322
COBR
8.423
COBR
8.531
COBR
8.661
COBR
8.831
COBR
9.059
COBR
9.360
COBR
9.739
COBR
10.193
COBR
10.708
COBR
11.254
COBR
11.785
COBR
12.392
COBR
12.548
COBR
12.657
COBR
12.630
COBR
12.392
COBR
11.785
COBR
11.254
COBR
10.708
COBR
10.193
COBR
9.739
COBR
9.360
COBR
9.059
COBR
8.831
COBR
8.661
COBR
8.531
COBR
8.423
COBR
8.322
COBR
8.212
COBR
8.082
COBR
7.923
COBR
7.727
COBR
7.488
COBR
7.200
COBR
6.861
COBR
6.471
COBR
6.036
COBR
5.564
COBR
5.071
DL1
DL2
CENT
BTSBTS COBRACOBRA
Deg1Deg1 Deg2Deg2
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 99
Current Component Status – Cryo. Lines + Current Component Status – Cryo. Lines + TargetsTargets
• LNLN2 2 & LHe& LHe Transfer Lines:Transfer Lines:
LNLN2 2 Line offers being soughtLine offers being sought
LHe Line LHe Line COMPLICATION -- COMPLICATION -- new line needed to new line needed to E5E5
• Targets:Targets: simulation work concerning size underway in conjunctionsimulation work concerning size underway in conjunction
with BTS studies, after which mechanics & He-Bag questionwith BTS studies, after which mechanics & He-Bag question
will be tackledwill be tackled
• LNLN2 2 & LHe& LHe Transfer Lines:Transfer Lines:
LNLN2 2 Line offers being soughtLine offers being sought
LHe Line LHe Line COMPLICATION -- COMPLICATION -- new line needed to new line needed to E5E5
• Targets:Targets: simulation work concerning size underway in conjunctionsimulation work concerning size underway in conjunction
with BTS studies, after which mechanics & He-Bag questionwith BTS studies, after which mechanics & He-Bag question
will be tackledwill be tackled
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 1010
Summary/ConclusionsSummary/Conclusions
• Shutdown 2004 Shutdown 2004 until Beginning MAYuntil Beginning MAY
• Initially only Triplet I used for Timing-counter beam time whileInitially only Triplet I used for Timing-counter beam time while COBRA installation runs in parallel (behind Concrete wall)COBRA installation runs in parallel (behind Concrete wall)
• Old Separator + new Triplet II used for commissioning up to Old Separator + new Triplet II used for commissioning up to BTS injection BTS injection (June/July)(June/July)
• New Separator not until, at least New Separator not until, at least October October
• BTS not before BTS not before November November so that commissioning 2nd part of so that commissioning 2nd part of beam line (beam line (Need ~6 weeks for thisNeed ~6 weeks for this) at end of year ) at end of year i.e. BTS musti.e. BTS must
arrive by beginning Nov. to use time effectively, otherwise Gottaarrive by beginning Nov. to use time effectively, otherwise Gotta
(PROBLEM GOTTA et al. 6 weeks BT end-of-year)(PROBLEM GOTTA et al. 6 weeks BT end-of-year)
• If beam line commissioned by end December If beam line commissioned by end December Bfield Mapping COBRA during Shutdown 2004/5Bfield Mapping COBRA during Shutdown 2004/5
• Shutdown 2004 Shutdown 2004 until Beginning MAYuntil Beginning MAY
• Initially only Triplet I used for Timing-counter beam time whileInitially only Triplet I used for Timing-counter beam time while COBRA installation runs in parallel (behind Concrete wall)COBRA installation runs in parallel (behind Concrete wall)
• Old Separator + new Triplet II used for commissioning up to Old Separator + new Triplet II used for commissioning up to BTS injection BTS injection (June/July)(June/July)
• New Separator not until, at least New Separator not until, at least October October
• BTS not before BTS not before November November so that commissioning 2nd part of so that commissioning 2nd part of beam line (beam line (Need ~6 weeks for thisNeed ~6 weeks for this) at end of year ) at end of year i.e. BTS musti.e. BTS must
arrive by beginning Nov. to use time effectively, otherwise Gottaarrive by beginning Nov. to use time effectively, otherwise Gotta
(PROBLEM GOTTA et al. 6 weeks BT end-of-year)(PROBLEM GOTTA et al. 6 weeks BT end-of-year)
• If beam line commissioned by end December If beam line commissioned by end December Bfield Mapping COBRA during Shutdown 2004/5Bfield Mapping COBRA during Shutdown 2004/5
Delay in Full Commissioning of MEG beam Line now expected Delay in Full Commissioning of MEG beam Line now expected Though Should NOT Delay Experiment Start !!!Though Should NOT Delay Experiment Start !!!
P.-R. KettleP.-R. Kettle MEG-Review February 2004MEG-Review February 2004 1111
Provisional MEG Beam ScheduleProvisional MEG Beam Schedule