1. P.-R. KettleMEG-Review February 20041 MEG Beam Line Studies  E5 Z-Branch NOW !!! NOW !!!

2. P.-R. KettleMEG-Review February 20042 Topics to be Addressed Summary of Status at the time of the last Review Summary of Status at the time of the last Review Current Component Status Current Component Status Summary/Conclusions Summary/Conclusions Beam Line Schedule Beam Line Schedule Summary of Status at the time of the last Review Summary of Status at the time of the last Review Current Component Status Current Component Status Summary/Conclusions Summary/Conclusions Beam Line Schedule Beam Line Schedule

3. P.-R. KettleMEG-Review February 20043 Summary Status (Review July 2003) Beam Line Milestone just achieved – Beam Line Milestone just achieved – Successful test of optics up to point of injection into COBRA Solenoid As well as beam properties (Phase Space, Stopping rate, Separation Quality, etc.) matching the proposed values … using temporary components !!! … using temporary components !!! Triplet I Separator II Triplet II PSC-Solenoid in: Nov. 2002 Defect !!! most Last Run Temporary Temporary out: Jun. 2003 out: Jun. 2003 out: Jun. 2003 out: Jun. 2003 -> LEM -> New -> Shorter -> Too Short Bore too small

4. P.-R. KettleMEG-Review February 20044 Summary Status (Review July 2003) – cont. Beam Transport Solenoid BTS - under study Beam Transport Solenoid BTS - under study estimated earliest delivery …early summer 2004 estimated earliest delivery …early summer 2004 LN 2 + LHe transfer Lines under discussion LN 2 + LHe transfer Lines under discussion Remaining Beam Elements - under discussion Remaining Beam Elements - under discussion

5. P.-R. KettleMEG-Review February 20045 Current Component Status – Triplet I + Separator Triplet I:Triplet I: - QSB Quadrupole magnets being removed during re-build of µE4 Area during during re-build of µE4 Area during current Shutdown, will be assembled current Shutdown, will be assembled as triplet as triplet - Wagon for triplet being constructed from lower-part of shielding wagon lower-part of shielding wagon - High Acceptance +-slit Vacuum Chamber under design under design  Insertion Shutdown 2004 (~April)  Insertion Shutdown 2004 (~April) Triplet I:Triplet I: - QSB Quadrupole magnets being removed during re-build of µE4 Area during during re-build of µE4 Area during current Shutdown, will be assembled current Shutdown, will be assembled as triplet as triplet - Wagon for triplet being constructed from lower-part of shielding wagon lower-part of shielding wagon - High Acceptance +-slit Vacuum Chamber under design under design  Insertion Shutdown 2004 (~April)  Insertion Shutdown 2004 (~April) Separator : Separator : - New Vertical Separator was approved for MEG design underway & HV-parts ordered design underway & HV-parts ordered  not expected before October 2004 !!!  not expected before October 2004 !!! Separator : Separator : - New Vertical Separator was approved for MEG design underway & HV-parts ordered design underway & HV-parts ordered  not expected before October 2004 !!!  not expected before October 2004 !!!

6. P.-R. KettleMEG-Review February 20046 Current Component Status – Triplet II + BTS Triplet II: Triplet II: - QSK Triplet + Vacuum Chamber removed from µE4 beam line - QSK Triplet + Vacuum Chamber removed from µE4 beam line during current shutdown during current shutdown  Available after shutdown 2004 (April)  Available after shutdown 2004 (April) Triplet II: Triplet II: - QSK Triplet + Vacuum Chamber removed from µE4 beam line - QSK Triplet + Vacuum Chamber removed from µE4 beam line during current shutdown during 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 Tests replaces PSC-test Sol. used in Beam Tests - Delayed !!! – due to - Delayed !!! – due to (i)COBRA coupling problems more complexthan envisaged complex than envisaged (ii) non-negligible amount of time (ii) non-negligible amount of time invested in beam & detector setup invested in beam & detector setup simulation for LXe Large Prototype simulation for LXe Large Prototype test in  1 Oct.  end Dec.2003 test in  1 Oct.  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 Tests replaces PSC-test Sol. used in Beam Tests - Delayed !!! – due to - Delayed !!! – due to (i)COBRA coupling problems more complexthan envisaged complex than envisaged (ii) non-negligible amount of time (ii) non-negligible amount of time invested in beam & detector setup invested in beam & detector setup simulation for LXe Large Prototype simulation for LXe Large Prototype test in  1 Oct.  end Dec.2003 test in  1 Oct.  end Dec.2003 BTS COBRA

7. P.-R. KettleMEG-Review February 20047 Current Component Status – BTS cont. BTS – Complications: (i) focusing optics at Collimator found focusing optics at Collimator found to be v. sensitive to STRAY FIELD to be v. sensitive to STRAY FIELD solenoid excitation curve DESTROYED solenoid excitation curve DESTROYED if Bfield TOO LARGE if Bfield TOO LARGE 50% of Stray Field from COBRA 5m away !!! 5m away !!!  Compensation Coil Needed upstream of BTS  Compensation Coil Needed upstream of BTS under Design… under Design… BTS – Complications: (i) focusing optics at Collimator found focusing optics at Collimator found to be v. sensitive to STRAY FIELD to be v. sensitive to STRAY FIELD solenoid excitation curve DESTROYED solenoid excitation curve DESTROYED if Bfield TOO LARGE if Bfield TOO LARGE 50% of Stray Field from COBRA 5m away !!! 5m away !!!  Compensation Coil Needed upstream of BTS  Compensation Coil Needed upstream of BTS under Design… under Design… Triplet 2 11 SolenoidSolenoid WIENWIEN FilterFilter Colli. Trip. µ+µ+µ+µ+ µ+µ+µ+µ+ e+e+e+e+ e+e+e+e+ e+e+e+e+ e+e+e+e+ µ+µ+µ+µ+ µ+µ+µ+µ+

8. P.-R. KettleMEG-Review February 20048 Current Component Status – BTS cont. BTS – Complications: (ii) Requirements: Requirements: - BTS Bfield must have min. influence - BTS Bfield must have min. influence on COBRA field in fiducial region on COBRA field in fiducial region -Min. beam-spot size at Target contradictory!!! contradictory!!! -  Only free parameters (coupled): B BTS & ΔL COBRA-BTS B BTS & ΔL COBRA-BTS Focus also dependent on how split degrader (M.S. vs. Background) Full Simulation underway: Full Simulation underway:  TRANSPORT, TURTLE, Track  Optics  GEANT  spot-size, resolution  ANSYS  Magnetic influence  Delivery BTS not before ~Nov. 2004 BTS – Complications: (ii) Requirements: Requirements: - BTS Bfield must have min. influence - BTS Bfield must have min. influence on COBRA field in fiducial region on COBRA field in fiducial region -Min. beam-spot size at Target contradictory!!! contradictory!!! -  Only free parameters (coupled): B BTS & ΔL COBRA-BTS B BTS & ΔL COBRA-BTS Focus also dependent on how split degrader (M.S. vs. Background) Full Simulation underway: Full Simulation underway:  TRANSPORT, TURTLE, Track  Optics  GEANT  spot-size, resolution  ANSYS  Magnetic influence  Delivery BTS not before ~Nov. 2004 BTSCOBRADeg1Deg2

9. P.-R. KettleMEG-Review February 20049 Current Component Status – Cryo. Lines + Targets LN 2 & LHe Transfer Lines: LN 2 & LHe Transfer Lines: In planning phase In planning phase Targets: Targets: simulation work concerning size underway in conjunction simulation work concerning size underway in conjunction with BTS studies, after which mechanics & He-Bag question with BTS studies, after which mechanics & He-Bag question will be tackled will be tackled LN 2 & LHe Transfer Lines: LN 2 & LHe Transfer Lines: In planning phase In planning phase Targets: Targets: simulation work concerning size underway in conjunction simulation work concerning size underway in conjunction with BTS studies, after which mechanics & He-Bag question with BTS studies, after which mechanics & He-Bag question will be tackled will be tackled

10. P.-R. KettleMEG-Review February 200410 Summary/Conclusions Shutdown 2004 until mid April Shutdown 2004 until mid April Initially only Triplet I used for Timing-counter beam time while Initially 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 (June/July) BTS injection (June/July) New Separator not until, at least October New Separator not until, at least October BTS not before November so that commissioning 2nd part of BTS not before November so that commissioning 2nd part of beam line (Need ~6 weeks for this) at end of year i.e. BTS must beam line (Need ~6 weeks for this) at end of year i.e. BTS must arrive 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 2004/5  Bfield Mapping COBRA during Shutdown 2004/5 Shutdown 2004 until mid April Shutdown 2004 until mid April Initially only Triplet I used for Timing-counter beam time while Initially 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 (June/July) BTS injection (June/July) New Separator not until, at least October New Separator not until, at least October BTS not before November so that commissioning 2nd part of BTS not before November so that commissioning 2nd part of beam line (Need ~6 weeks for this) at end of year i.e. BTS must beam line (Need ~6 weeks for this) at end of year i.e. BTS must arrive 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 2004/5  Bfield Mapping COBRA during Shutdown 2004/5 Delay in Full Commissioning of MEG beam Line now expected Though Should NOT Delay Experiment Start !!! Though Should NOT Delay Experiment Start !!!

11. P.-R. KettleMEG-Review February 200411 Provisional MEG Beam Schedule Gotta et al. ???