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ANU Injection & Abort Lines

ANU Injection & Abort Lines. ANU Extraction Line and RR30. Dave Johnson. Meiqin Xiao March 19, 2007. Injection Line Motivation Layout Modifications to 8 GeV line Modifications to Recycler Lattice MI8 to Recycler MI8 to MI /mini-Boone Aperture Recycler Injection Magnets

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ANU Injection & Abort Lines

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  1. ANU Injection & Abort Lines ANU Extraction Line and RR30 Dave Johnson Meiqin Xiao March 19, 2007 ANU Inject & Abort dej

  2. Injection Line Motivation Layout Modifications to 8 GeV line Modifications to Recycler Lattice MI8 to Recycler MI8 to MI /mini-Boone Aperture Recycler Injection Magnets Power Supplies Instrumentation Abort Line Existing Lattice Recycler modifications Kicker Strength/Trajectories Kick Errors Aperture Summary 1531-v1 Magnet and Instrumentation Counts for Nova Recycler 1529-v1 Recycler Abort Line with Gap Clearing Kickers for the Nova 1501-v1 Recycler Injection Line Options for the Nova Project 1495-v1 Recycler Injection Kicker Configuration in the Nova 1596-v5 Kicker for PP2 Specifications Outline Related Documents ANU Inject & Abort dej

  3. Motivation • Although the initial solution produced an acceptable optical solution, • it required large ADC magnets to be hung from wide tunnel ceiling over mini-Boone line, • potential field leakage into Recycler. • Features of new design. • hybrid vertical bending (next slide) • use permanent magnets (“easy” installation) • Only 2 powered magnets (switch & Lambertson) • fewer PS, reduced controls, less cable, less cooling, SB area • reduced impact on tunnel utilities (hopefully) • requires new mirror magnet design • requires construction of existing Lambertson design (MLA) ANU Inject & Abort dej

  4. Cartoon of Layout HKICK (1.208 mr) 5 kickers 2 bumpers VLAM (MLA) 13.6 mr (DC) V2 (PDD) 19.2 mr 102 100 103 104 MQT trims Mirror magnets (new) Recycler K QR852 New MQT trims QR853 846 847 HBEND (35 mr) 848 850 849 852 851 MI8 MI 101 103 102 8 Gev line • Modifications to 8 GeV line • 846: • Replace LEP with HDC • Add MQT trim (ramped) • 847: • Replace LEP with VDC • Add MQT trim (ramped) • 848: • Replace LEP with HDC • Add MQT trim (ramped) • Shift BPM upstream • Install ADC 10” downstream of SQA steel • 849: • Shift quad 849 downstream by 80 inches • Move PDD-040 to “upper” line and replace w/ PDD_M mirror magnet Mini-Boone switch magnet SWITCH MAGNET (15 Hz) V1 (ADCW) 32.8 mr • Modifications to Recycler (besides ECOOL removal) • 101: • Move v101 corrector to upstream corrector slot • Design beam pipe from 101 to Lambertson (crotch) • 102: • Move h102 corrector and BPM (hp102) to middle between A & B quad • Install MI beam pipe from Lambertson to Q103 Trim RQMxMQTRQMxMQTRQMXBPMMW ANU Inject & Abort dej

  5. Q846 • Replace LEP with HDC • Add MQT trim (ramped) • Vacuum modifications ANU Inject & Abort dej

  6. Q847 • Replace LEP with VDC • Add MQT trim • Vacuum modifications (require shift SQA ?) ANU Inject & Abort dej

  7. Q848 • Replace LEP with HDC • Add MQT trim • Shift BPM upstream • Vacuum modifications • Install ADC 10” downstream of SQA steel ANU Inject & Abort dej

  8. Summary of Modifications • Modifications to 8 GeV line • 846: • Replace LEP with HDC • Add MQT trim (ramped) • 847: • Replace LEP with VDC • Add MQT trim • 848: • Replace LEP with HDC • Add MQT trim • Shift BPM upstream • Install ADC 10” downstream of SQA steel • 849: • Shift quad 849 downstream by 80 inches • Move PDD-040 to “upper” line and replace w/ PDD_M mirror magnet • Modifications to Recycler (besides ECOOL removal) • 101: • Move v101 corrector to upstream corrector slot • Design beam pipe from 101 to Lambertson (crotch) • 102: • Move h102 corrector and BPM (hp102) to middle between A & B quad • Install MI beam pipe from Lambertson to Q103 ANU Inject & Abort dej

  9. Q848 VLAM K104 Q846 Q102(RR) V(up) VLAM (dn) V(dn) Match into Recycler All PM quads within standard Recycler strength ANU Inject & Abort dej

  10. Match to MI/mini-Boone Q846 Q849 Q851 Q101 Quad trims (ramped) Mini-Boone switch LAM101 (MI) K103 ANU Inject & Abort dej

  11. Min horizontal aperture Vertical aperture Beamline Aperture • Provide for loss free transmission • Expect emittance of 15-20 p (history shows with large tails) • Would like to provide at least 1 s for loss free steering • Assume 99% in 6s with 1%out 8s -> use 10s with 25p beam See next slide ANU Inject & Abort dej

  12. Recycler Injection Lambertson Kickers injection circulating • Nominal 54 mm separation • Inj. Trajectory || to straight , inj. angle provided by Lambertson roll (~5o) • Nominal kick angle 1.208 mr (71.6 G-m) • MLA (field region increase) 44->50mm • MI beam pipe Lambertson->Q103 ANU Inject & Abort dej

  13. Summary of Required Magnets *One from spares and one moved from 8Gev line and replaced with mirror magnet * ANU Inject & Abort dej

  14. Power Supply Summary • Switching Magnet (15 Hz) • Required current: 611 Amps • Magnet resistance 38.4 mOhms • New supply patterned after mini-Boone switcher supply • Lambertson (DC) • Required current (with MLA modification): 396 Amps • Voltage: • Quad trims (15 Hz) • Required current: < 20A • Resistance: 1.6 ohms Inductance: 67 mH • Slew rate: ~400 A/sec • Voltage: 42 V @ 10A max slew rate • Number of channels: 3 • Quad trims (DC) • Required current: < 10 Amps • Voltage: 16 volts • Number of channels: 5 • Dipole trims (DC) • Required current: < 10 Amps • Resistance • Number of channels: 5 new ANU Inject & Abort dej

  15. Instrumentation • Utilize all recycled hardware and electronics (MI, Recycler, RR22, RR32, A1) • Require position measurement for steering/matching (1 bump) • Require profile measurement matching -> Multiwires • Monitor loss (share existing loss monitors while adding a few around strategic places like switch magnets and Lambertsons) - details not yet finalized • IPM (???) where ?? ANU Inject & Abort dej

  16. ABORT LINE ANU Inject & Abort dej

  17. 400 402 Dump LAM402 LAM402 KICKER MI EnclosureWall Existing ABORT LINE • Recycler abort line shares the beam absorber with the MI. • Contains vacuum break downstream of the Lambertson (do we keep ?) • Abort kicker double duty as pbar extraction kicker (pbar function will go away with Nova) • NEW > Want to install gap clearing kickers so the beam in the injection gap is cleanly sent to the absorber Oct 2000 Recycler e-log RR 5 MI • Assume ~5E13/1.33 sec • Assume 2% in gap • 1E12/1.3sec • 1 kW ANU Inject & Abort dej

  18. HT400 HP400 VP400 5 Gap Clearing Kickers Q400B G400A G341A G341B Abort Kicker 2 Bumper Kickers New RR40 Configuration • Move abort kicker between G400A and Q400B • Install Gap clearing kickers downstream of Q400B • Fit to same position at entrance to Lambertson with both kickers-> • difference in angle at entrance to Lambertson 100 ur -> 0.3 mm difference at Lambertson exit • Abort kicker nominal angle 1.07 mr and full turn kicker (>9.5 us) @ 0.77 Hz • Gap clearing: nominal angle 1.18 mr with ~1.6 us flattop / 57ns rise/fall @ 15 Hz ANU Inject & Abort dej

  19. Abort SWIC location Orbits ‘n such Lamb gap clearing abort inside • Closed orbit 22 mm inside • Extraction position 32 mm outside (both) • Phase advance • H: kick-Lam 90o Lam-absorber 180o • V: kick-Lam 90o Lam-absorber 90o • 5% kick error (either) produces 2.7mm displacement at both the Lambertson and absorber. -> set flattop tilt to 4% Closed orbit outside Trajectory with 5% error ANU Inject & Abort dej

  20. Blue-vertical L H V V V Red-horizontal Beam envelope (10s) for 25 p 24” round 4” round H ellipse V ellipse L H V V V 24” round 4” round H ellipse V ellipse Apertures • Abort line contains both elliptical and round beam pipe (4”) • Several tight spots for 10s of 25p • Comfortable for 6s • Modify envelope (?) with trim quads Beam envelope (6s) for 25 p ANU Inject & Abort dej

  21. Extracted beam Lambertson Aperture • Cross section of Recycler beam pipe (thru Q402 upstream of Lambertson) and Lambertson aperture • No problem with commissioning beam • Big beam- tight • Replace Recycler beam pipe (401-402) with MI ellipse • Lambertson remains tight for 10s 25p Big Beam (25p) Commissioning Beam (10p) Approx MI pipe ANU Inject & Abort dej

  22. Summary • Injection Line Design Finalized • Required magnets and fields specified • Abort geometry and Kicker strengths specified • 3D Model of each Injection and Extraction areas • (\\beamssrv1\mechdrft\public\meiqin) • Next steps: • Look at tunnel /utility interferences • Verify modifications to existing beamlines • Stand design • Vacuum system design ANU Inject & Abort dej

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