Experimental Validation of a Novel Compact Focusing Scheme for Future Energy-Frontier Linear Lepton Colliders

White, G.; Ainsworth, Robert; Akagi, T.; Alabau-Gonzalvo, Javier; Angal-Kalinin, D.; Araki, S.; Aryshev, Alexander; Bai, Sha; Bambade, P.; Bett, Douglas; Blair, G.A.; Blanch, C.; Blanco, Óscar; Blaskovic-Kraljevic, N.; Bolzon, B.; Boogert, Stewart; Burrows, Philip; Christian, G.B.; Corner, L.; Davis, M. R.; Faus‐Golfe, A.; Fukuda, Masafumi; Gao, Jie; García-Morales, H.; Geffroy, N.; Hayano, H.; Heo, A.; Hildreth, M.; Honda, Y.; Huang, J. Y.; Hwang, Woonbong; Iwashita, Yoshihisa; Jang, Seong Ho; Jérémie, A.; Kamiya, Yoshio; Karataev, P.; Kim, E. S.; Kim, H. S.; Kim, S. H.; Kim, Y. I.; Komamiya, S.; Kubo, K.; Kume, Tatsuya; Kuroda, S.; Lam, Briant; Lekomtsev, Konstantin; Liu, S.; Lyapin, A.; Marín, Eduardo; Masuzawa, M.; McCormick, Douglas; Naito, Takashi; Nelson, J.; Nevay, Laurence; Okugi, T.; Omori, T.; Oroku, Masahiro; Park, H.; Park, Yong Joon; Perry, C.; Pfingstner, Juergen; Phinney, N.; Rawankar, A.; Renier, Y.; Resta-López, Javier; Ross, M.; Sanuki, T.; Schulte, Daniel; Seryi, Andrei; Shevelev, M.; Shimizu, Hirotaka; Snuverink, J.; Spencer, C.M.; Suehara, Taikan; Sugahara, R.; Takahashi, Tohru; Tanaka, R.; Tauchi, T.; Terunuma, N.; Tomás, Rogelio; Urakawa, J.; Wang, D.; Warden, Matthew; Wendt, M.; Wolski, A.; Woodley, M.; Yamaguchi, Y.; Yamanaka, T.; Yan, Jun; Yokoya, Kaoru; Zimmermann, F.

doi:10.1103/physrevlett.112.034802

Cited by 40 publications

(40 citation statements)

References 9 publications

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“…This value is a relatively large emittance compared to the typical optimised vertical value of the ATF2, which in the damping ring is 10 pm and 10 -30 pm in the extraction line. The extraction line optics optimisation procedure [13] was not carried out in full for laserwire operation periods and higher emittance values are to be expected.…”

Section: Quadrupole Scanmentioning

confidence: 99%

“…Without this knowledge, the model left some ambiguity about the size of the electron beam. The extraction line was significantly upgraded to create a prototype final focus system for future linear colliders, called ATF2 [12,13]. This paper presents results from the upgraded ATF laserwire system that aims to achieve micrometre sized transverse profiles using a visible wavelength laser system.…”

Section: Introductionmentioning

confidence: 99%

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Laserwire at the Accelerator Test Facility 2 with submicrometer resolution

Nevay

Boogert

Karataev

et al. 2014

Phys. Rev. ST Accel. Beams

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A laserwire transverse electron beam size measurement system has been developed and operated at the Accelerator Test Facility 2 at the High Energy Accelerator Research Organization, Japan (KEK). Special electron beam optics were developed to create an approximately 1 × 100 μm (vertical × horizontal) electron beam at the laserwire location, which was profiled using 150 mJ, 71 ps laser pulses with a wavelength of 532 nm. The precise characterization of the laser propagation allows the non-Gaussian laserwire scan profiles caused by the laser divergence to be deconvolved. A minimum vertical electron beam size of 1.07 AE 0.06ðstatÞ AE 0.05ðsysÞ μm was measured. A vertically focusing quadrupole just before the laserwire was varied while making laserwire measurements and the projected vertical emittance was measured to be 82.56 AE 3.04 pm rad.

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Section: Quadrupole Scanmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laserwire at the Accelerator Test Facility 2 with submicrometer resolution

Nevay

Boogert

Karataev

et al. 2014

Phys. Rev. ST Accel. Beams

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“…As an extension of ATF, ATF2 aims to address the feasibility of focusing the beam to a few tens of nanometer size and providing beam orbit stabilization at the nanometer level at the IP. ATF2 is also an energy-scaled version of the compact focusing optics designed for the ILC, using a similar local chromaticity correction scheme [17,18].…”

Section: A Accelerator Test Facilitymentioning

confidence: 99%

Evaluation of beam halo from beam-gas scattering at the KEK Accelerator Test Facility

Yang

Naito

Bai

et al. 2018

Phys. Rev. Accel. Beams

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In circular colliders, as well as in damping rings and synchrotron radiation light sources, beam halo is one of the critical issues limiting the performance as well as potentially causing component damage and activation. It is imperative to clearly understand the mechanisms that lead to halo formation and to test the available theoretical models. Elastic beam-gas scattering can drive particles to large oscillation amplitudes and be a potential source of beam halo. In this paper, numerical estimation and Monte Carlo simulations of this process at the ATF of KEK are presented. Experimental measurements of beam halo in the ATF2 beam line using a diamond sensor detector are also described, which clearly demonstrate the influence of the beam-gas scattering process on the transverse halo distribution.

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“…In 2008 a new beam extraction line ("ATF2" [6]) was installed at ATF. This includes a beam line with a system of magnetic focusing and steering elements that forms a low-energy prototype of a design [7,8] for the final-focus system of ILC or CLIC. The goals of the ATF2 collaboration [9] are to produce an electron beam spot with a 37 nm vertical size, and eventually to stabilize the vertical beam position at the focal point at the nanometer level.…”

Section: Introductionmentioning

confidence: 99%

Design and performance of a high resolution, low latency stripline beam position monitor system

Apsimon

Bett

Kraljevic

et al. 2015

Phys. Rev. ST Accel. Beams

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A high-resolution, low-latency beam position monitor (BPM) system has been developed for use in particle accelerators and beam lines that operate with trains of particle bunches with bunch separations as low as several tens of nanoseconds, such as future linear electron-positron colliders and free-electron lasers. The system was tested with electron beams in the extraction line of the Accelerator Test Facility at the High Energy Accelerator Research Organization (KEK) in Japan. It consists of three stripline BPMs instrumented with analogue signal-processing electronics and a custom digitizer for logging the data. The design of the analogue processor units is presented in detail, along with measurements of the system performance. The processor latency is 15.6 AE 0.1 ns. A single-pass beam position resolution of 291 AE 10 nm has been achieved, using a beam with a bunch charge of approximately 1 nC.

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Experimental Validation of a Novel Compact Focusing Scheme for Future Energy-Frontier Linear Lepton Colliders

Cited by 40 publications

References 9 publications

Laserwire at the Accelerator Test Facility 2 with submicrometer resolution

Laserwire at the Accelerator Test Facility 2 with submicrometer resolution

Evaluation of beam halo from beam-gas scattering at the KEK Accelerator Test Facility

Design and performance of a high resolution, low latency stripline beam position monitor system

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