ILC2016x Lattice Description Updates and CR-11 Implementation

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Explore the latest changes in the ILC2016x lattice description, including modifications to the undulator positron source, energy compression systems, and beam delivery system collimation setup. Learn about the CR-11 implementation for enhanced performance.

  • ILC updates
  • CR-11 implementation
  • lattice description
  • beam delivery system
  • collider
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  1. ILC2016x 12/08/2016 LCWS2016 (Morioka, Japan) 1

  2. Overview the previous official release of ILC lattice description files (MAD8 Extended Standard Input Format files) was designated ILC2015b - https://bitbucket.org/whitegr/ilc-lattices the latest ILC release, designated ILC2016x, is ILC2015b plus the following changes: 1. implementation of Change Request CR-011 rearrangement of undulator positron source - remove low-energy transport line between pre-acceleration and booster linac - add short collimation/emittance diagnostic section after pre-acceleration - move booster linac upstream - add energy compressor after booster linac (before path length adjuster) 3 chicanes to generate R56 one 9-cavity cryomodule (moved from PLTR) - remove energy compression sub-systems from PLTR pre-PLTR chicane one 9-cavity cryomodule (moved to new energy compressor) - modify PLTR lattice around spin rotator solenoid prepare space for possible replacement of superconducting solenoid with room temperature solenoids at a later time 2. reduce length of positron LET system by 0.319462 m to maintain e+/e- path length difference 3. changes to Beam Delivery System collimation setup by Glen White and Lew Keller - reconfigured spoiler/absorber locations - addition of muon spoilers 12/08/2016 LCWS2016 (Morioka, Japan) 2

  3. 12/08/2016 LCWS2016 (Morioka, Japan) 3

  4. CR-11 implementation based on designs by T. Okugi 2015/10/07 12/08/2016 LCWS2016 (Morioka, Japan) 4

  5. e+ Source changes for CR11 (1) PPA - no changes through end of PPALIN (pre-acceleration) section - exit matching section modified - three 45 FODO cells added (new PPAEMIT section) > Lcell = 8 m > space for 3 sets (X and Y) of betatron collimators separated by 45 ( X,Y 15 m) > space for 4 wire scanners separated by 45 for emittance measurement ( X,Y 10 m) PTRANL (removed) PBSTR - entrance matching section modified > remove one quadrupole - booster linac moved upstream by 397.310894 m > no changes to booster linac configuration or component complement - exit matching section modified PEC (new) - three 4-dipole chicanes added for R56 generation (L 20 m per chicane) > Xmax 1285 mm > max 1330 mm > R56total 1416 mm > Stotal 688 mm - one Type A 9-cavity cryomodule (moved from pLTR) > Vtotal = 131 MV (zero-crossing phase) 12/08/2016 LCWS2016 (Morioka, Japan) 5

  6. e+ Source changes for CR11 (2) PPLA (same configuration as ILC2015b) - entrance matching section modified - three 4-dipole chicanes for path length adjustment (L 20 m per chicane) - parameters for S = S0 (S can be adjusted 230 mm) > Xmax 744 mm > max 752 mm > R56total 464 mm > Stotal 230 mm - exit matching section modified PTRANH - FODO lattice lengthened by ~300 m > Ncell = 38 (was 36) > Lcell = 32 m (was 25.3 m) > cell = 90 (was 38 ) PLTR - remove energy compressor / path length adjuster chicane (at end of PTRANH, before PLTR) - entrance matching section modified - remove energy compressor RF > one Type A 9-cavity cryomodule (moved to PEC) - replace lattice around spin rotator solenoid with slightly modified Okugi-san design > prepare space for possible replacement of superconducting solenoid with room temperature solenoids at a later time > superconducting solenoid itself is unchanged from ILC2015b (L = 8.32 m, Bz = 3.162 T) 12/08/2016 LCWS2016 (Morioka, Japan) 6

  7. ILC2016x PPA PCAP PLTR PTRANH PBSTR PEC/PLA PPAEMIT ILC2015b PPA PCAP PLTR PTRANL PBSTR PTRANH PLA PEC/PLA chicane 12/08/2016 LCWS2016 (Morioka, Japan) 7

  8. ILC2016x PCAP PBSTR PPA PPAEMIT possible wire scanner location possible collimator location ILC2015b PCAP PTRANL PPA 12/08/2016 LCWS2016 (Morioka, Japan) 8

  9. ILC2016x PBSTR PTRANH PEC PEC RF PLA chicane ILC2015b PBSTR PTRANH PLA 12/08/2016 LCWS2016 (Morioka, Japan) 9

  10. ILC2016x PBSTR PTRANH PEC chicane PEC RF PLA ILC2015b PBSTR PTRANH PLA 12/08/2016 LCWS2016 (Morioka, Japan) 10

  11. ILC2016x PTRANH PDRINJ PLTR ILC2015b PEC RF PTRANH PDRINJ PLTR PEC/PLA chicane 12/08/2016 LCWS2016 (Morioka, Japan) 11

  12. ILC2016x PTRANH PDRINJ PLTR ILC2015b PEC RF PTRANH PDRINJ PLTR PEC/PLA chicane 12/08/2016 LCWS2016 (Morioka, Japan) 12

  13. e+ LET changes for CR11 PLTL - reduce length of RTMATCH beamline (just upstream of turnaround) by 0.159731 m - rematch return line to turnaround PBC2 - reduce length of BC2_ML_2 beamline (matching between PBC2 and PML) by 0.159731 m - rematch PBC2 to PML 12/08/2016 LCWS2016 (Morioka, Japan) 13

  14. LTL to turnaround match turnaround DR extraction BC2 to Main Linac match Return Line Main Linac IP 12/08/2016 LCWS2016 (Morioka, Japan) 14

  15. BDS changes in ILC2016x eCOL/pCOL (low energy) - reconfigured spoiler/absorber locations and added muon spoiler definitions as per recent simulation study for muon background supression eFF/pFF (low energy) - reconfigured spoiler/absorber locations and added muon spoiler definitions as per recent simulation study for muon background supression eCOL/pCOL (high energy) - reconfigured spoiler/absorber locations and added muon spoiler definitions as per recent simulation study for muon background supression eFF/pFF (high energy) - reconfigured spoiler/absorber locations and added muon spoiler definitions as per recent simulation study for muon background supression see Glen White s presentation later this morning 12/08/2016 LCWS2016 (Morioka, Japan) 15

  16. ILC2016x: ECOL/PCOL (ECM 600 GeV) x y ILC2016x: EFF/PFF (ECM 600 GeV) 12/08/2016 LCWS2016 (Morioka, Japan) 16

  17. ILC2016x: ECOL/PCOL (ECM > 600 GeV) x y ILC2016x: EFF/PFF (ECM > 600 GeV) 12/08/2016 LCWS2016 (Morioka, Japan) 17

  18. To-Do List (in no particular order) 1. need to fix earth s curvature following and vertical orbit/dispersion compensation - broken since ILC2015a release see Arun Saini s Tuesday presentation BSY laserwire chicane offset large enough for laserwire photon detection? - old (polarimeter) chicane offset was 20 mm offset now is 8 mm document work for configuration of spoilers, absorbers & muon spoilers document muon fluxes with different configurations including muon wall if no muon wall -> shielding requirements for neutrons design and documentation of BCS in BDS; emergency extraction kicker requirements further optimization of FFS lattice, especially for Ecm < 500 GeV; error tolerances tight for all lattices, mover tolerances very tight consider design of dispersion correction system for BDS design of FD anti-solenoid, inclusion into models of FD field-map & anti-DID, check simulated tuning; generate field and vibration tolerance specs 10. complete design and decks for abort/tuneup lines to tuneup/abort dump and from undulator to main dump; make consistent with beam dump CR 11. FFS matching: operational phase control for FFS & collimation system, optimized 6-parameter matching; define match tolerances 12. 1 TeV extraction line design- currently beam loss rates too high 13. convert ILC decks to AML format? 14. UAP: debug AML parsers to all common deck formats 15. define a consistent nomenclature for decks and apply 16. develop and maintain a common start-end tracking environment 17. merge repository into EDMS and document 2. 3. 4. 5. 6. 7. 8. 9. 12/08/2016 LCWS2016 (Morioka, Japan) 18

  19. ILC2016x: Lattice Repository 12/08/2016 LCWS2016 (Morioka, Japan) 19

  20. https://bitbucket.org/whitegr/ilc-lattices no account (user ID, password) required to download Until ILC2016x is officially accepted (i.e. incorporated into EDMS system), it should be downloaded from a specific branch of the repository (see next slide ) 12/08/2016 LCWS2016 (Morioka, Japan) 20

  21. https://bitbucket.org/whitegr/ilc-lattices/downloads?tab=brancheshttps://bitbucket.org/whitegr/ilc-lattices/downloads?tab=branches download the RC2016X branch (complete set of ILC MAD input files) 12/08/2016 LCWS2016 (Morioka, Japan) 21

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