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S. Peggs

First Name: S.

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Last Name: Peggs

Full Name: S. Peggs

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2 papers
title: Extraction from TeV-Range Accelerators Using Bent Crystal Channeling
format: journal article
publisher: Nuclear Instruments & Methods B
year: 1994
45 authors: R.A. Carrigan | D. Chen | P. Colestock | D. Herrup | G. Goderre | G. Jackson | C.T. Murphy | R. Stefanski | S. Baker | N. Mokhov | B. Parker | H. J. Shih | R. Soundranayagam | T. Toohig | S. Peggs | C. R. Sun | A. Boden | D. B. Cline | W. Gabella | S. Ramachandran | J. Rhoades | J.B. Rosenzweig | M. Arenton | S. Conetti | B. Cox | D. Dukes | V. Golovatyuk | A. McManus | K. Nelson | B. Norem | B. Newberger | J. A. Ellison | A. Erwin | R. Rossmanith | A. Kovalenko | A. Taratin | N. Malakhov | E. Tsyganov | M. Bavizhev | V. Biryukov | M. Maslov | A. Khanzadeev | T. Prokofieva | V. Samsonov | G. Solodov
abstract: Plans and first results from Fermilab Experiment 853 are presented. E853 is an experiment to test the feasibility and efficiency of extracting a low-intensity beam from the halo of the Tevatron using channeling in a bent silicon crystal. The motivation of the experiment is to apply crystal extraction to trans-TeV accelerators like the LHC. Channeling developments related to crystal extraction and some early results from accelerator studies at the Tevatron are presented.

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title: RF Voltage Modulation at Discrete Frequencies, for Application to Proton Extraction Using Crysal Channeling
format: conference proceeding
conference: PAC 1993
year: 1993
4 authors: Gabella, W. | J.B. Rosenzweig | Kick, R. | Peggs, S.
abstract: RF voltage modulation at a finite number of discrete frequencies is described in a Hamiltonian framework. The theory is applied to the problem of parasitic extraction of protons from a circulating beam in a high energy hadron collider, using a bent crystal as a thin ?septum? extraction element. Three modes of employing discrete resonances are discussed: a strong, single drive resonance which may be used to excite protons to hit, deep within the crystal; a single resonance ramped in such a manner that the island can carry trapped particles from low to high amplitudes; and overlapping resonances to create a chaotic band for separating the moving island and the large amplitude island. Simulations are used to confirm the expected dynamics, and finally a prototypical extraction scheme is described.

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