3 papers

title:	Characterization of plasma accelerators with RF linac terminology
format:	conference procceeding
conference:	ICFA Second Generation Plasma Acceleration Workshop
year:	1998
3 authors:	Ogata, A. | J. B. Rosenzweig | M. Ferrario
abstract:	The physics of plasma acceleration is described by using RF linac terminology such as shunt impedance, filling time, transit time factor, etc. It is shown that some differences between conventional RF accelerators and plasma accelerators make it difficult to import the RF linac terminology directly into the new field. For example, the shunt impedance is of limited use and the filling time is no use in wake-field accelerators with single-drive beams or single-pump pulses. The beatwave accelerator, a driven oscillator system, has in a sense more similarity to RF linacs than wake-field accelerators. It was shown that plasma wave decay due to collisions and modulational instability seriously deteriorate the quality factor. (26 References).
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title:	Progress on Plasma Lens Experiments at the Final Focus Test Beam
format:	conference procceeding
conference:	1995 Particle Accelerator Conference
year:	1995
34 authors:	P. Kwok | Chen, P. | D. B. Cline | Barletta, W. | Berridge, S. | Bugg, W. | Bula, C. | S. Chattopadhyay | Craddock, W. | Hsu, I. | R. Iverson | T. Katsouleas | Lai, P. | Leemans, W. | Liou, R. | McDonald, K. T. | D. Meyerhofer | Nakajima, K. | Nakanishi, H. | Ng, C. K. | Nishida, Y. | Norem, J. | Ogata, A. | J. B. Rosenzweig | Ross, M. | Sessler, A. | Shintake, T. | Spencer, J. | Su, J. J. | Weidemann, A. W. | Westenskow, G. | D. Whittum | Williams, R. | J. Wurtele
abstract:	The proposal to perform a series of plasma lens experiments at the Final Focus Test Beam at SLAC has been described earlier. We report on our progress towards validation of concepts involved in the experiments, including the laser ionized plasma production test, development of the supersonic gas jet as the plasma source, and study on focused beam size measurement techniques. Most importantly, the effects of background events due to plasma lenses in future linear collider detectors, such as that in the NLC, are studied in details and are shown to be within detector tolerances.
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title:	Plasma Lens Experiments at the Final Focus Test Beam
format:	conference procceeding
conference:
year:	1995
33 authors:	Lieu, R. | Barletta, W. | S. Chattopadhyay | Chen, P. | D. B. Cline | Craddock, W. | Gabella, W. | Hsu, I. | R. Iverson | T. Katsouleas | P. Kwok | Lai, P. | Leemans, W. | Liou, R. | D. Meyerhofer | Nakajima, K. | Nakanishi, H. | Ng, C. K. | Nishida, Y. | Norem, J. | Ogata, A. | Rajagopalan, S. | Shintake, T. | J. B. Rosenzweig | Ross, M. | Sessler, A. | Spencer, J. | Su, J. J. | Walker, N. | Westenskow, G. | D. Whittum | Williams, R. | J. Wurtele
abstract:	We intend to carry out a series of plasma lens experiments at the Final Focus Test Beam facility at SLAC. These experiments will be the first to study the focusing of particle beams by plasma focusing devices in the parameter regime of interest for high energy colliders, and is expected to lead to plasma lens designs capable of unprecedented spot sizes. Plasma focusing of positron beams will be attempted for the first time. We will study the effects of lens aberrations due to various lens imperfections. Several approaches will be applied to create the plasma required including laser ionization and beam induced tunneling ionization of a working gas - the latter which has never been observed before. The compactness of our device should prove to be of interest for applications at the SLC and the next generation linear colliders.
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