نتایج جستجو برای: 6 mev electron beam

تعداد نتایج: 1335450  

Journal: :Medical physics 2004
K K Kainz K R Hogstrom J A Antolak P R Almond C D Bloch C Chiu M Fomytskyi F Raischel M Downer T Tajima

Laser wakefield acceleration (LWFA) technology has evolved to where it should be evaluated for its potential as a future competitor to existing technology that produces electron and x-ray beams. The purpose of the present work is to investigate the dosimetric properties of an electron beam that should be achievable using existing LWFA technology, and to document the necessary improvements to ma...

Journal: :Physics in medicine and biology 1996
P J Keall P W Hoban

Knowledge of the angular distribution of an electron beam at the applicator face is a necessary parameter in defining a beam when the Hogstrom pencil beam method of dose calculation is used. The angular spread can be found experimentally using penumbra widths measured at various distances from the applicator face. Using knowledge of the geometry and composition of the scattering foils of the li...

2008
Valeriy D. DUGAR-ZHABON Eduardo A. OROZCO

An autoresonance relativistic motion of 0.1 mA electron beam in a combined steady-state inhomogeneous magnetic field and a stationary microwave field is studied. The space profile of the axially symmetric magnetic field is fitted to maintain the interaction of electrons with the microwave field of cyclotron resonance type on all their trajectories. The Newton-Lorentz equation is simulated simul...

2005
S. V. Tolmachev P. Musumeci C. Pellegrini J. Rosenzweig

Here we describe the manufactured KIAE-2p planar undulator designed for the Inverse Free Electron Laser experiment at the University of California in Los Angeles. New technology enabled to fabricate the installation responding to the stringent requirements on mechanical construction accuracy and magnetic field strong tapering. Results of the magnetic field measurements by different methods are ...

2001
L. Merminga G. A. Krafft V. A. Lebedev

Electron-proton colliders with center of mass energies between 14 GeV and 30 GeV and luminosities at the 10 level have been proposed recently as a means for studying hadronic structure [1]. Electron beam polarization appears to be crucial for the majority of experiments. Two accelerator design scenarios have been examined in detail: colliding rings [2] and recirculating linac-on-ring [3]. Altho...

Journal: :Spektra: jurnal fisika dan aplikasinya 2022

The water phantom is used for LINAC calibration to measure absorbed dose radiation. Practically, it requires a long preparation time and considered less efficient. To increase efficiency, the medical physics team in hospital uses slab as tool. Consequently, correction factor crucial define equivalence of doses resulted from phantom. measurement was performed according IAEA TRS-398 dosimetry pro...

2001
P. Musumeci C. Pellegrini

We present a two stage Inverse Free Electron Laser accelerator proposed for construction at the UCLA Neptune Lab. Proof-of -principle experiments on the IFEL scheme have been carried out successfully. This experiment is intended to achieve a 100 MeV energy gain, staging two IFEL modules. It will use a 16 MeV electron beam, a 1 TW CO2 laser and two different tapered helical undulators. The probl...

Journal: :Physical review letters 2000
Neil Bohn Benson Biallas Douglas Dylla Evans Fugitt Grippo Gubeli Hill Jordan Li Merminga Piot Preble Shinn Siggins Walker Yunn

Jefferson Laboratory's kW-level infrared free-electron laser utilizes a superconducting accelerator that recovers about 75% of the electron-beam power. In achieving first lasing, the accelerator operated "straight ahead" to deliver 38-MeV, 1.1-mA cw current for lasing near 5 &mgr;m. The waste beam was sent directly to a dump while producing stable operation at up to 311 W. Utilizing the recircu...

2011
S. M. Wiggins G. H. Welsh R. C. Issac E. Brunetti R. P. Shanks S. Cipiccia M. P. Anania G. G. Manahan C. Aniculaesei B. Ersfeld M. R. Islam D. A. Jaroszynski W. A. Gillespie

The ALPHA-X laser wakefield accelerator beam line comprises a high power (900 mJ, 35 fs) Ti:sapphire laser pulse, a gas jet (length 2 mm, plasma density ~ 10 cm) accelerating structure and a suite of single-shot electron beam diagnostics. Monoenergetic electron beams with central energy up to 220 MeV are generated in the accelerator. By operating close to the threshold for injection with low be...

2001
Y. Yano

The radioisotope (RI) beam facility is under construction at RIKEN. In the first phase, a new multi-stage acceleration system consisting of three ring cyclotrons with K=510 MeV, 980 MeV and 2500 MeV in each will be commissioned in 2005. It will boost the heavy-ion beams’ energies obtained by the existing K540-MeV ring cyclotron up to 350 MeV/nucleon. Intense RI beams are produced mostly via the...

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