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Design of Transfer Line-2 (TL-2) for CLIC Test Facility – 3 (CTF-3)

Design of Transfer Line-2 (TL-2) for CLIC Test Facility – 3 (CTF-3). Amalendu Sharma, A.Rahim, A.D.Ghodke and Gurnam Singh. IOAPDD Raja Ramanna Centre for Advanced Technology Indore – 452 013 India. CTF-3 collaboration meeting, January 2007, CERN. Indian participation.

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Design of Transfer Line-2 (TL-2) for CLIC Test Facility – 3 (CTF-3)

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  1. Design of Transfer Line-2 (TL-2) for CLIC Test Facility – 3 (CTF-3) Amalendu Sharma, A.Rahim, A.D.Ghodke and Gurnam Singh IOAPDD Raja Ramanna Centre for Advanced Technology Indore – 452 013 India CTF-3 collaboration meeting, January 2007, CERN.

  2. Indian participation CTF-3 and Indian participation Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  3. Progress so far Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  4. Main requirements of design • R56 from -0.35m to +0.35m. • T566 = 0 in entire range of tuning. •  = 4-5m and  = 0 at exit in both planes. • Emittance dilution < 10%. • 4m dispersion free region for the tail clippers (collimators). • Available magnets to be used. • Line implementation in the existing building. Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  5. Beam parameters Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  6. Magnets available Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  7. 4m Length of final matching doublet 20.75 Minimum distance from the edge of element to wall > 50mm M 6.37m 17 3.2m 1.21m Geometrical constraints Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  8. Module-3 Tunable R56 achromatic arc, Final matching doublet Module-2 Straight section for collimator. vertical achromat, matching section for Module-3 Module-1 From extraction point of CR to first bend magnet. An achromat Beam direction. Design approach The design studies are carried out using MAD-8 program. Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  9. A Beam direction Design details: Module-1 Module-1 is an achromat with opposite bends from extraction septa of CR to first bend. • Very low flexibility in achromat. • Quadrupoles close to its highest strength. • High  at exit of module-1 => Rapid rise in . Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  10. Space for tail clipper Beam direction Vertical Achromat Design details: Module-2 Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  11. Design details: Module-3 The linear matrix element for controlling the bunch length Change in Path Length Momentum deviation = p/p Second order relation between path length and momentum deviation Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  12. Design details: Module-3 Bunch length manipulation (linear) Energy-time correlation with RF-field Where chirp Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  13. Design details: Module-3 Bunch length manipulation (including second order terms) Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  14. Mirror plane of R56 arc Beam Direction Layout of Module-3 Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  15. Approach Find out dispersion and its derivative for required R56 and to form an achromat. Find a solution, such that 1. High  @ sextupoles to control T566. 2. Decoupled s @ sextupole locations. 3. I – transformer between sextupoles. Required Twiss parameters at Matching point Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  16. Twiss parameters and Dispersion R56 = -0.35 (MAD sign convention) Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  17. Twiss parameters and Dispersion Continued… R56 = 0.00 Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  18. Twiss parameters and Dispersion Continued… R56 = +0.35 Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  19. Vertical dispersion Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  20. T566 correction and phase space distortion T566 Correction with sextupoles Phase space distortion R56 = -0.35m X-Plane Y-Plane R56 = 0.00 Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  21. Available Magnets and Power Supplies Needed Dipole magnets Quadrupole magnets Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  22. Available Magnets and Power Supplies Needed… Sextupole magnets Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  23. A Better Alternative For lowering -functions in module-2, one more quadrupole is added in the module-1. Preliminary results are… R56 = +0.35 R56 = 0.00 Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  24. R56 = -0.35 Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  25. Complete layout of line with building Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  26. Summary • Optics design in linear zone done for the R56 from -0.35m to +0.35m. • T566 correction studies in progress and preliminary results of R56 = 0.00 and -0.35 obtained. • -functions higher in module-2 beginning and can be lowered with one more quadrupole in Module-1. Acknowledgements We are thankful to Dr. Hans Braun, Dr. Frank Tecker for the valuable review and feedback during this work. Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

  27. Thanks Design of TL-2 for CTF-3, RRCAT, India. CTF-3 collaboration meeting, January 2007, CERN.

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