Beam operation with crab cavities at KEKB

Abe, T.; Agho, T.; Akai, K.; Akemoto, M.; Akiyama, A.; Arinaga, M.; Ebihara, K.; Egawa, K.; Enomoto, Atsushi; Flanagan, J.; Fukuda, Shigeki; Fukuma, H.; Funakoshi, Y.; Furukawa, K.; Funiya, T.; Hara, K.; Higo, T.; Hiramatsu, S.; Hisamatsu, Hiromi; Honma, Hiroaki; Honma, T.; Hosoyama, K.; Ieiri, T.; Iida, N.; Ikeda, Hirokazu; Ikeda, Mitsuo; Inagaki, S.; Isagawa, S.; Ishii, Hitoshi; Kabe, A.; Kadokura, E.; Kageyama, T.; Kakihara, K.; Kako, E.; Kamada, S.; Kamitani, T.; Kanazawa, Kenichi; Katagiri, Hiroaki; Kato, Shigekí; Kimura, Takashi; Kazakov, S.; Kikuchi, M.; Kikutani, E.; Kitagawa, K.; Koiso, H.; Kojima, Yuuji; Komada, I.; Kubo, Tadashi; Kudo, K.; Kudo, Norio; Marutsuka, K.; Masuzawa, M.; Matsumoto, Shûji; Matsumoto, T.; Michizono, Shinichiro; Mikawa, K.; Mimashi, T.; Mitsunobu, S.; Mori, K.; Morita, Akio; Morita, Yuichi; Nakai, H.; Nakajima, Hiromitsu; Nakamura, Tatsuro; Nakanishi, Hiroshi; Nakanishi, Koichi; Nakao, Katsumi; Ninomiya, S.; Ogawa, Y.; Ohmi, K.; Ohsawa, S.; Ohsawa, Y.; Ohnishi, Y.; Ohuchi, N.; Oide, K.; Ono, Masaaki; Ozaki, T.; Saito, Kenji; Sakai, Hiroshi; Sakamoto, Yutaka; Satō, Masayuki; Satoh, Masanori; Shibata, K.; Shidara, T.; Shirai, Mitsuru; Shirakawa, A.; Sueno, T.; Suetake, M.; Suetsugu, Y.; Sugahara, R.; Sugimura, T.; Suwada, T.; Tajima, O.; Takano, S.; Takasaki, S.; Takenaka, T.; Takeuchi, Y.; Tawada, M.; Takeuchi, Masaki; Tobiyama, M.; Tokuda, N.; Uehara, S.; Uno, S.; Yamamoto, Yasuchika; Yano, Yoshiharu; Yokoyama, K.; Yoshida, Mitsuhiro; Yoshimoto, S.; Yoshino, K.; Perevedentsev, E. A.; Shatilov, D.

doi:10.1109/pac.2007.4440798

Cited by 4 publications

(1 citation statement)

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“…To circumvent this issue, HERA implemented a head-on collision scheme at the expense of adopting a large bunch spacing. The KEK-B electron-positron collider at the High Energy Accelerator Research Organization (KEK) opted instead for a large crossing angle of 22 mrad and demonstrated in the 2000s the full recovery of head-on collisions between electron and positron bunches with crab cavities [35]. Simulations had shown that crab crossing would not only increase luminosity by enabling a full geometric overlap of the colliding bunches but also by its effect on the associated beambeam tune shift [36].…”

Section: Common Challenges and Enabling Technologiesmentioning

confidence: 99%

Electron-Hadron Colliders: EIC, LHeC and FCC-eh

2022

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Electron-hadron colliders are the ultimate tool for high-precision quantum chromodynamics studies and provide the ultimate microscope for probing the internal structure of hadrons. The electron is an ideal probe of the proton structure because it provides the unmatched precision of the electromagnetic interaction, as the virtual photon or vector bosons probe the proton structure in a clean environment, the kinematics of which is uniquely determined by the electron beam and the scattered lepton, or the hadronic final state accounting appropriately for radiation. The Hadron Electron Ring Accelerator HERA (DESY, Hamburg, Germany) was the only electron-hadron collider ever operated (1991–2007) and advanced the knowledge of quantum chromodynamics and the proton structure, with implications for the physics studied in RHIC (BNL, Upton, NY) and the LHC (CERN, Geneva, Switzerland). Recent technological advances in the field of particle accelerators pave the way to realize next-generation electron-hadron colliders that deliver higher luminosity and enable collisions in a much broader range of energies and beam types than HERA. Electron-hadron colliders combine challenges from both electron and hadron machines besides facing their own distinct challenges derived from their intrinsic asymmetry. This review paper will discuss the major features and milestones of HERA and will examine the electron-hadron collider designs of the Electron-Ion Collider (EIC) currently under construction at BNL, the CERN’s Large Hadron electron Collider (LHeC), at an advanced stage of design and awaiting approval, and the Future Circular lepton-hadron Collider (FCC-eh).

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Section: Common Challenges and Enabling Technologiesmentioning

confidence: 99%