نتایج جستجو برای: ion beam machine

تعداد نتایج: 565322  

ژورنال: سنجش و ایمنی پرتو 2017

In this paper design and simulation of an optimized accelerator tube is presented for the production of light charged particles up to energy of 2 MeV. Geometry of the accelerator tube electrodes was simulated based on the Van De Graaff accelerator tubes of Atomic Energy Organization by SIMION 7.0, Virtual Device and SIMION Toolkit codes. In accelerator tube, the extracted ion beam from the ion ...

2016
J. Piekoszewski M. Gryziński J. Langner Z. Werner G. C. Huth

2014 The paper presents the first demonstration of a new method of forming photovoltaic p-n junction in silicon by the « Pulse Implantation Doping (PID) » technique. In this technique, an intense ion pulse provides both the dose necessary for doping and the portion of energy required to recrystallize a damage-free, doped surface layer. The ion beam pulses within the range of one microsecond and...

2001
W. Zhang L. A. Ahrens J. Mi B. Oerter R. Sanders

The RHIC Beam Abort Kicker Power Supply Systems commissioning experience and the remaining issues will be reported in this paper. The RHIC Blue Ring Beam Abort Kicker Power Supply System initial commissioning took place in June 1999. Its identical system in Yellow Ring was brought on line during Spring 2000. Each of the RHIC Beam Abort Kicker Power Supply Systems consists of five high voltage m...

2002
W. Barth L. Dahl L. Groening S. Richter S. Yaramyshev

During the beam time in 2003 a carbon beam from the ECR ion source was mainly accelerated via the high charge state injector (HLI) in the UNILAC for the SIS-injection like in the years before [1]. Several UNILAC experiments used the beam with high duty factor additionally. Additionally, the ECR source was in operation for the production of various isotopes (2H, He, Ne, Mg, Ar, Ca, Cr, Zn, Xe). ...

Journal: :The Review of scientific instruments 2016
P Agostinetti M Giacomin G Serianni P Veltri F Bonomo L Schiesko

The Radio Frequency (RF) negative hydrogen ion source prototype has been chosen for the ITER neutral beam injectors due to its optimal performances and easier maintenance demonstrated at Max-Planck-Institut für Plasmaphysik, Garching in hydrogen and deuterium. One of the key information to better understand the operating behavior of the RF ion sources is the extracted negative ion current densi...

1998
Jayashree Saxena Kenneth M. Butler Hari Balachandran David B. Lavo Tracy Larrabee F. Joel Ferguson Brian Chess

Automated fault diagnosis based on the stuckat fault model is not always effective. This paper presents practical experiences in applying a bridging fault based diagnosis technique to a TI ASIC design. Results are presented for units into which known bridging defects have been introduced via a focused ion beam (FIB) machine.

2017
Michael P Barnes Peter B Greer

Machine Performance Check (MPC) is an automated and integrated image-based tool for verification of beam and geometric performance of the TrueBeam linac. The aims of the study were to evaluate the MPC beam performance tests against current daily quality assurance (QA) methods, to compare MPC performance against more accurate monthly QA tests and to test the sensitivity of MPC to changes in beam...

B. Hu, D. Pan, R. Jia, X. Li, Y. Chen, Y. Du,

Background: Cancer stem-like cells (CSCs) play a crucial role in the initiation, progression, and recurrence of cancer. Evidence indicates that the high linear energy transfer (LET) carbon ion beam is more effective against CSCs than the conventional X-ray beam. Carbon ion radiotherapy is considered as a promising cancer strategy, however, information about whether, or not, new CSCs are induced...

2007
J. Xu B. Mustapha V. N. Aseev P. N. Ostroumov

The design and operation support of hadron (proton and heavy-ion) linear accelerators require substantial use of beam dynamics simulation tools. The beam dynamics code TRACK has been originally developed at Argonne National Laboratory (ANL) to fulfill the special requirements of the rare isotope accelerator (RIA) accelerator systems. From the beginning, the code has been developed to make it us...

1999
T. Renk D. Hanson B. Turman R. Leeper T. Mehlhorn

We are still continuing our effort to apply the cryogenic technique to the pulsed ion beam generation and the target ablation experiments with such ion beams. In this article, the most recent progress and the most interesting results in this field are described shortly. The origin of this kind of research work exists in our early work shown in [1], for example, where we produced the pure nitrog...

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