Download or read book Update on the ATF Inverse Cerenkov Laser Acceleration Experiment written by and published by . This book was released on 1993 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The inverse Cerenkov acceleration (ICA) experiment is being performed on the Accelerator Test Facility (ATF) located at Brookhaven National Laboratory. This facility presently features a 50 MeV e-beam and a (approximately)10 GW peak power CO2 laser. In the experiment 1.7 atm of H2 gas is used to slow the phase velocity of the light wave to match the electron velocity. The Cerenkov angle is 20 mrad and the interaction length is 20 cm. A peak energy gain of (approximately)12 MeV is predicted assuming 5-GW of laser peak power delivered to the interaction region. An update of the experiment's progress is presented.

Download or read book Inverse Cerenkov Laser Acceleration Experiment at ATF written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inverse Cerenkov Experiment Final Report written by and published by . This book was released on 1993 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The final report describes work performed to investigate inverse Cherenkov acceleration (ICA) as a promising method for laser particle acceleration. In particular, an improved configuration of ICA is being tested in a experiment presently underway on the Accelerator Test Facility (ATF). In the experiment, the high peak power (∼ 10 GW) linearly polarized ATF CO2 laser beam is converted to a radially polarized beam. This is beam is focused with an axicon at the Cherenkov angle onto the ATF 50-MeV e-beam inside a hydrogen gas cell, where the gas acts as the phase matching medium of the interaction. An energy gain of ∼12 MeV is predicted assuming a delivered laser peak power of 5 GW. The experiment is divided into two phases. The Phase I experiments, which were completed in the spring of 1992, were conducted before the ATF e-beam was available and involved several successful tests of the optical systems. Phase II experiments are with the e-beam and laser beam, and are still in progress. The ATF demonstrated delivery of the e-beam to the experiment in Dec. 1992. A preliminary d̀̀ebugging ̀̀run with the e-beam and laser beam occurred in May 1993. This revealed the need for some experimental modifications, which have been implemented. The second run is tentatively scheduled for October or November 1993. In parallel to the experimental efforts has been ongoing theoretical work to support the experiment and investigate improvement and/or offshoots. One exciting offshoot has been theoretical work showing that free-space laser acceleration of electrons is possible using a radially-polarized, axicon-focused laser beam, but without any phase-matching gas. The Monte Carlo code used to model the ICA process has been upgraded and expanded to handle different types of laser beam input profiles.

Download or read book Design Analysis for a 100 MeV Inverse Cerenkov Laser Accelerator written by and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of a 100-MeV demonstration experiment based upon inverse Cerenkov acceleration (ICA) is presented. This experiment would use the Accelerator Test Facility (ATF) at Brookhaven National Laboratory. With 50-GW of delivered laser peak power from the ATF CO2 laser, our analysis indicates the 65-MeV ATF e-beam can be accelerated to>165 MeV using three stages of acceleration in (approximately)1 m of total length. The number of electrons accelerated can be raised to (approximately)109 by prebunching the e-beam using an already available device.

Download or read book Inverse Cerenkov Laser Accelerator Experiment Annual Report 1990 Annual Report written by and published by . This book was released on 1991 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past year further progress was made on preparations for the Spectra Technology, Inc. (STI) inverse Cerenkov acceleration (ICA) experiment to be performed on the Accelerator Test Facility (ATF) at Brookhaven National Laboratory. Major progress was made in the design and fabrication of the experimental apparatus. This includes the gas cell, where the ICA process occurs, and the optical system that converts the CO2 laser beam into a radially polarized beam. In terms of progress on theoretical work, the authors finished optimizing the ATF ICA design parameters using their Monte Carlo computer simulation. The optimized design predicts for the ATF conditions that over 50% energy gain should be observed. They published a paper on an improved method of performing ICA by operating near the resonance of a gas. They also began analysis of a method of accelerating particles in a vacuum using a radially polarized beam and axicon focusing. Although this new method can no longer be considered ICA, it has the potential of high acceleration gradients without the drawbacks of gas scattering and gas breakdown. Three papers were published and two conference papers were presented during 1990.

Download or read book Proceedings of the 1993 Particle Accelerator Conference Held in Washington DC on May 17 20 1993 written by and published by . This book was released on 1994 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1) Adventures with accelerators; 2) Demonstration of Plasma Beat Wave Acceleration of Electrons from 2 MeV to 20 MeV; 3) Laser Wakefield Accelerator Experiments using 1ps 30TW Nd:glass Laser; 4) Photonic Band Gap Resonators for High Energy Accelerators; 5) Update on the ATF Inverse Cerenkov Laser Acceleration Experiment.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-02 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 100 MeV Laser Accelerator Demonstration and 1 GeV Baseline Design Development 1992 Annual Report written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The acceleration of relativistic electrons using the inverse Cerenkov effect was first demonstrated at Stanford University in 1981. Later, Fontana and Pantell developed an improved configuration for the inverse Cerenkov acceleration (ICA) process. A radially polarized laser beam is focused by an axicon onto the e-beam traveling through a gas-filled interaction region. The light intersects the e-beam at the Cerenkov angle [theta][sub c], where [theta][sub c] = cos[sup [minus]1](1/n[beta]), n is the index of refraction of the gas, and [beta] is the ratio of the electron velocity to the speed of light. The goal of the present program is to demonstrate improved laser acceleration using the Fontana and Pantell configuration. The experiments will be performed on the Accelerator Test Facility (ATF) located at Brookhaven National Laboratory (BNL). This facility features a 50 MeV linac fed by a Nd:YAG (4[omega]) laser-driven photocathode e-gun. It will be upgraded to 65 MeV in the near future. The ATF also has a high peak power CO[sub 2] laser, which was developed for laser acceleration studies. The present ICA experiment was divided into two phases. Phase 1 was to examine certain experimental issues in preparation for Phase 2. Phase 1 was successfully completed in the spring of 1992. Phase 2 is to perform the actual laser acceleration experiments on the ATF e-beam. The authors are currently waiting for the availability of the e-beam so that they can begin the Phase 2 experiments. In this section, the theory and experimental hardware for the present program are described. The results of the Phase 1 experiments are presented, and an update on the Phase 2 experiment is given.

Download or read book The Secretary s Annual Report to Congress written by United States. Department of Energy and published by . This book was released on 1991 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book European Particle Accelerator Conference Epac 94 In 3 Volumes written by Christine Petit-jean-genaz and published by World Scientific. This book was released on 1994-11-26 with total page 2968 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings aim to provide a comprehensive overview of research, technology and applications in the field of accelerators. Contributions from the entire field of accelerators are presented, including low and high energy machines, and medical and industrial accelerators.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1995-05 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Teckningar till svenska historien written by and published by . This book was released on 1839 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Energy Accelerators Heacc 92 Proceedings Of The Xv International Conference In 2 Volumes written by J Rossbach and published by World Scientific. This book was released on 1993-02-10 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The High Energy Accelerator Conference has always been the monitor of the state of the art and the new trends in planning, construction and operation of large particle accelerators. It is held every three years. The 1992 conference is devoted to High Energy Hadron Accelerators and Colliders, Linear Colliders, e⁺e⁻ Storage Rings and related Technologies for these machines. In addition to status reports and contributed papers, the program features twelve survey talks which include summaries of individual poster papers.

Download or read book Conference Record of the 1991 IEEE Particle Accelerator Conference written by and published by . This book was released on 1991 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Accelerator Concepts Lake Arrowhead CA 1989 written by Chan Joshi and published by Springer. This book was released on 1989 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invited presentations and contributed papers from a January 1989 conference in Lake Arrowhead, California. Addresses plasma-based accelerator concepts and the use of plasmas in future high-energy accelerators, wake-field devices, radio and optical frequency acceleration and sources, high brightness

Download or read book Beam Instrumentation written by Alex H. Lumpkin and published by A I P Press. This book was released on 1997 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the May 1996 workshop, including tutorial, invited, and contributed papers. Subjects include a subpicosecond bunch duration measurement technique based on autocorrelation of coherent transition radiation, commissioning results of the APS storage ring diagnostics systems, bunch instabi