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S. A. Bogacz

First Name: S. A.

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Last Name: Bogacz

Full Name: S. A. Bogacz

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5 papers
title: Proposed continuous wave energy recovery operation of an x-ray free electron laser
format: journal article
publisher: Physical Review Special Topics - Accelerators and Beams
year: 2005
17 authors: J. Sekutowicz | S.A. Bogacz | D. Douglas | P. Kneisel | G.P. Williams | M. Ferrario | I. Ben-Zvi | J. Rose | J. Smedley | Srinivasan-Rao, T. | L. Serafini | W.D. Moller | B. .Petersen | D. Proch | S. Simrock | P. Colestock | J.B. Rosenzweig
abstract: Commissioning of two large coherent light facilities (XFELs) at SLAC and DESY should begin in 2008 and 2011, respectively. In this paper we look further into the future, hoping to answer, in a very preliminary way, two questions. First: What will the next generation of XFEL facilities look like? Believing that superconducting technology offers advantages such as high quality beams with highly populated bunches, the possibility of energy recovery and higher overall efficiency than warm technology, we focus this preliminary study on the superconducting option. From this belief the second question arises: What modifications in superconducting technology and in the machine design are needed, as compared to the present DESY XFEL, and what kind of research and development program should be proposed to arrive in the next few years at a technically feasible solution with even higher brilliance and increased overall conversion of ac power to photon beam power? In this paper we will very often refer to and profit from the DESY XFEL design, acknowledging its many technically innovative solutions.
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title: Beam extraction studies at 900 GeV using a channeling crystal
format: journal article
publisher: Physical Review Special Topics-Accelerators & Beams
year: 2002
26 authors: R. Carrigan | D. Chen | G. Jackson | N. Mokhov | C.T. Murphy | S. I. Baker | S. A. Bogacz | D. B. Cline | S. Ramachandran | J. Rhoades | J.B. Rosenzweig | A. Asseev | R. A. Biryukov | A. Taratin | J. A. Ellison | A. Khanzadeev | T. Prokofieva | V. Samsonov | G. Solodov | B. Newberger | E. Tsyganov | H. J. Shih | W. Gabella | B. Cox | V. Golovatyuk | A. McManus
abstract: Luminosity-driven channeling extraction has been observed for the first time in a 900 GeV study at the Fermilab Tevatron. This experiment, Fermilab E853, demonstrated that useful TeV level beams can be extracted from a superconducting accelerator during high luminosity collider operations without unduly affecting the background at the collider detectors. Multipass extraction was found to increase the efficiency of the process significantly. The beam extraction efficiency was about 25%. Studies of time dependent effects found that the turn-to-turn structure was governed mainly by accelerator beam dynamics. Based on the results of this experiment, it is feasible to construct a parasitic 5?10 MHz proton beam from the Tevatron collider.
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title: First Observation of Luminosity-Driven Extraction Using Channeling with a Bent Crystal
format: preprint
year: 1998
26 authors: A. Asseev | S. I. Baker | S. A. Bogacz | R. A. Biryukov | R.A. Carrigan | D. Chen | D. B. Cline | B. Cox | J. A. Ellison | W. Gabella | V. Golovatyuk | G. Jackson | A. Khanzadeev | A. McManus | N. Mokhov | C.T. Murphy | B. Newberger | T. Prokofieva | S. Ramachandran | J. Rhoades | J.B. Rosenzweig | V. Samsonov | H. J. Shih | G. Solodov | A. Tartin | E. Tsyganov
abstract: Luminosity-driven channeling extraction has been observed for the first time from a 900 GeV circulating proton beam at the Fermilab Tevatron. The extraction efficiency was found to be of he order of 30%. A 150 kHz beam was obtained during luminosity-driven extraction with a tolerable background rate at the collider experiments, and a 900 kHz beam was obtained when background limits were doubled. This is the highest energy at which channeling has been observed.
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title: First observation of luminosity-driven extraction using channeling with a bent crystal
format: journal article
publisher: Physical Review Special Topics-Accelerators & Beams
year: 1998
26 authors: R. Carrigan | D. Chen | G. Jackson | N. Mokhov | C.T. Murphy | S. I. Baker | S. A. Bogacz | D. B. Cline | S. Ramachandran | J. Rhoades | J.B. Rosenzweig | A. Asseev | R. A. Biryukov | A. Taratin | J. A. Ellison | A. Khanzadeev | T. Prokofieva | V. Samsonov | G. Solodov | B. Newberger | E. Tsyganov | H. J. Shih | W. Gabella | B. Cox | V. Golovatyuk | A. McManus
abstract: Luminosity-driven channeling extraction has been observed for the first time using a 900 GeV circulating proton beam at the superconducting Fermilab Tevatron. The extraction efficiency was found to be about 30%. A 150 kHz beam was obtained during luminosity-driven extraction with a tolerable background rate at the collider experiments. A 900 kHz beam was obtained when the background limits were doubled. This is the highest energy at which channeling has been observed.
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title: First results from bent crystal extraction at the Fermilab Tevatron
format: journal article
publisher: Nuclear Instruments & Methods B
year: 1996
27 authors: C.T. Murphy | R. Carrigan | D. Chen | G. Jackson | N. Mokhov | H. J. Shih | B. Cox | V. Golovatyuk | A. McManus | A. Bogacz | D. B. Cline | S. Ramachandran | J. Rhoades | J.B. Rosenzweig | B. Newberger | J. A. Ellison | S. Baker | C. R. Sun | W. Gabella | E. Tsyganov | A. Taratin | A. Asseev | V. Biryukov | A. Khanzadeev | T. Prokofieva | V. Samsonov | G. Solodov
abstract: 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. Extensive simulation work has been carried out. Two accelerator operating modes have been developed for crystal studies, ''kick'' mode and diffusion mode. Results from the first successful extraction in kick mode are presented.
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