Studies of Room Temperature Accelerator Structures for the ILC Positron Source

Wang, J.W.; Adolphsen, C.; Bharadwaj, V.; Bowden, Gordon; Dolgashev, Valery; Jones, R.M.; Jongewaard, E.; Lewandoski, J.; Li, Z.; Miller, R.J.

doi:10.1109/pac.2005.1591283

Cited by 7 publications

(8 citation statements)

References 2 publications

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“…While the primary bunching is achieved by the L-band buncher, a final, relatively small, increment of bunching takes place in the first several cells in the pre-accelerator, which immediately follows the L-band buncher. The accelerating gradients in the L-band buncher and pre-accelerator are 5.5 MV/m and 8.5 MV/m [2], respectively, and the beam is accelerated to 76 MeV by the end of the injector. The first ~1.5 m of the L-band sections are immersed in a 660-G solenoid field to focus the beam, and then the field is tapered down to zero as the beam gains energy.…”

Section: Results With β=075 L-band Tw Bunchermentioning

confidence: 99%

Start-to-end Transport Design and Multi-particle Tracking for the ILC Electron Source

Zhou¹,

Batygin²,

Brachman³

et al. 2007

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A train of 2-ns micro bunches of longitudinally polarized electrons are generated in a 120-kV DC-gun based injector in the ILC electron source; a bunching system with extremely high bunching efficiency to compress the micro-bunch down to 20 ps FWHM is designed. Complete optics to transport the electron bunch to the entrance of the 5-GeV damping ring injection line is developed. Start-to-end multi-particle tracking through the beamline is performed including the bunching system, pre-acceleration, chicane, 5-GeV superconducting booster linac, spin rotators and energy compressor. It shows that 94% of the electrons from the DC-gun are captured within the damping ring 6-D acceptance − 09 AbstractA train of 2-ns micro bunches of longitudinally polarized electrons are generated in a 120-kV DC-gun based injector in the ILC electron source; a bunching system with extremely high bunching efficiency to compress the micro-bunch down to 20 ps FWHM is designed. Complete optics to transport the electron bunch to the entrance of the 5-GeV damping ring injection line is developed. Start-to-end multi-particle tracking through the beamline is performed including the bunching system, pre-acceleration, chicane, 5-GeV superconducting booster linac, spin rotators and energy compressor. It shows that 94% of the electrons from the DC-gun are captured within the damping ring 6-D acceptance − 09 . 0 ≤ + y

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Section: Results With β=075 L-band Tw Bunchermentioning

confidence: 99%

Start-to-end Transport Design and Multi-particle Tracking for the ILC Electron Source

Zhou¹,

Batygin²,

Brachman³

et al. 2007

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“…It must sustain high accelerator gradients during millisecond-long pulses in a strong magnetic field, provide adequate cooling in spite of high RF and particle loss heating, and produce a high positron yield with the required emittance. The design contains both standing-wave (SW) and traveling-wave (TW) L-band accelerator structures [23] The TW sections are 4.3 m long, 3π/4 mode constant gradient accelerator structures. The phase advance per cell has been chosen to optimize RF efficiency for a large aperture TW structure.…”

Section: Normal Conducting Rf Accelerator Systemmentioning

confidence: 99%

International Linear Collider Reference Design Report

Brau¹,

Okada²,

Walker³

et al. 2007

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“…Naturally realizing advantages of TW mode short RF pulse operation at the S-band and higher frequencies, DLW is now dominating normal conducting accelerating structure for these applications. In the L-band frequency range also there are proposals and examples of DLW applications for electrons or positrons acceleration, [1], [2]. For lower than L-band frequencies DLW application is not effective and there are no examples of applications, [3].…”

Section: Introductionmentioning

confidence: 99%

Parameters of the Disk Loaded Waveguide structure for intermediate particles acceleration in the intermediate energy range

Paramonov

2013

Preprint

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The Disk Loaded Waveguide (DLW) is the mostly used high frequency structure for acceleration of lightweight particles -electrons in the high energy range. In some physical experiments acceleration of more heavy particles -muons to medium energies γ ∼ 3 is required. DLW parameters are considered for particle velocity 0.04 ≤ β ≤ 1 both for the fundamental and the nearest backward spatial harmonics. Physical and technical restrictions for DLW application in the low β range and lower frequency (the L-band range) are analyzed. Basing on particularities of acceleration with Traveling Wave (TW) mode, deep optimization of DLW cells dimensions, the choice of optimal operating phase advance for each DLW section and combination of forward and backward TW modes, it is possible to create simple, cost effective acceleration system for acceleration in the velocity range 0.2 ≤ β ≤ 1 for intermediate particles, in some parameters overcoming accelerating system with RF cavities in Standing Wave (SW) mode. Design criteria are discussed and examples of possible accelerating systems are presented.

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Studies of Room Temperature Accelerator Structures for the ILC Positron Source

Cited by 7 publications

References 2 publications

Start-to-end Transport Design and Multi-particle Tracking for the ILC Electron Source

Start-to-end Transport Design and Multi-particle Tracking for the ILC Electron Source

International Linear Collider Reference Design Report

Parameters of the Disk Loaded Waveguide structure for intermediate particles acceleration in the intermediate energy range

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