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Title: Beam position monitors for LEReC

Authors:
; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1326765
Report Number(s):
BNL-112674-2016-CP
R&D Project: KBCH139; 18035; KB0202011
DOE Contract Number:
SC00112704
Resource Type:
Conference
Resource Relation:
Conference: International Beam Instrumentation Conference (IBIC 2016); World Trade Center, Barcelona, Spain; 20160911 through 20160915
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Sorrell Z., Cerniglia, P., Hulsart, R., Mernick, K., and Michnoff, R. Beam position monitors for LEReC. United States: N. p., 2016. Web.
Sorrell Z., Cerniglia, P., Hulsart, R., Mernick, K., & Michnoff, R. Beam position monitors for LEReC. United States.
Sorrell Z., Cerniglia, P., Hulsart, R., Mernick, K., and Michnoff, R. 2016. "Beam position monitors for LEReC". United States. doi:. https://www.osti.gov/servlets/purl/1326765.
@article{osti_1326765,
title = {Beam position monitors for LEReC},
author = {Sorrell Z. and Cerniglia, P. and Hulsart, R. and Mernick, K. and Michnoff, R.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 9
}

Conference:
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  • A panel discussion was held about beam position monitors and there use at different laboratories which include the SSC, BML, LANL, CEBAF, and CERN. (AIP)
  • A cylindrical beam-position monitor (BPM) used in many accelerator facilities has four electrodes on which beam-image currents induce bunched-beam signals. These probe-electrode signals are geometrically configured to provide beam-position information about two orthogonal axes. An electronic processor performs a mathematical transfer function (TF) on these BPM-electrode signals to produce output signals whose time-varying amplitude is proportional to the beam`s vertical and horizontal position. This paper will compare various beam-position TFs using both pencil beams and will further discuss how diffuse beams interact with some of these TFs.
  • Using a 47 GeV electron beam, the Final Focus Test Beam (FFTB) produces vertical spot sizes around 70 nm. These small beam sizes introduce an excellent opportunity to develop and test high resolution Radio Frequency Beam Position Monitors (RF-BPMs). These BPMs are designed to measure pulse to pulse beam motion (jitter) at a theoretical resolution of approximately 1 nm. The beam induces a TM{sub 110} mode with an amplitude linearly proportional to its charge and displacement from the BPM's (cylindrical cavity) axis. The C-band (5,712 MHz) TM{sub 110} signal is processed and converted into beam position for use by themore » Stanford Linear Collider (SLC) control system. Presented are the experimental procedures, acquisition, and analysis of data demonstrating resolution of jitter near 25 nm. With the design of future e{sup +}e{sup -} linear colliders requiring spot sizes close to 3 nm, understanding and developing RF-BPMs will be essential in resolving and controlling jitter.« less
  • The Low Energy Demonstration Accelerator (LEDA) facility located at Los Alamos National Laboratory (LANL) accelerates protons to an energy of 6.7-MeV and current of 100-mA operating in either a pulsed or cw mode. Of key importance to the commissioning and operations effort is the Beam Position Monitor system (BPM). The LEDA BPM system uses five micro-stripline beam position monitors processed by log ratio processing electronics with data acquisition via a series of custom TMS32OC40 Digital Signal Processing (DSP) boards. Of special interest to this paper is the operation of the system, the log ratio processing, and the system calibration technique.more » This paper will also cover the DSP system operations and their interaction with the main accelerator control system.« less