scholarly journals Features of relativistic electron radiation in storage rings

2019 ◽  
Vol 204 ◽  
pp. 03012
Author(s):  
Oleg Shishanin
Keyword(s):  
Quantum Correction ◽  
Photon Emission ◽  
Operator Method ◽  
Asymptotic Formulas ◽  
Angular Distributions ◽  
Magnetic Systems ◽  
Electron Orbit ◽  
Synchrotron Light ◽  
Alternating Magnetic Fields ◽  
Approximate Expressions

The formulation of the problem is due to the fact that the spectral properties of radiation in alternating magnetic fields, as compared with homogeneous fields, differ little, but the angular characteristics depend significantly on betatron oscillations. Because the dynamics of an electron in the magnetic systems of accelerators is rather complicated, a number of simplifications has been made here. The asymptotic formulas for the spectral and angular distributions of the radiation intensity with the first quantum correction have been obtained by Schwinger’s operator method. For them, as well as for the angular characteristics of synchrotron light, approximate expressions are given, allowing researchers to determine the desired properties of photon emission at certain points of the electron orbit.

Performance of the far-IR beamline of the 6 MeV tabletop synchrotron light source

2009 ◽  
Vol 16 (2) ◽  
pp. 299-306 ◽  
Author(s):  
Md. Monirul Haque ◽  
Hironari Yamada ◽  
Ahsa Moon ◽  
Mami Yamada
Keyword(s):  
Light Source ◽  
Optical System ◽  
Far Infrared ◽  
Beam Current ◽  
Small Ring ◽  
Thermal Source ◽  
Simulation Code ◽  
Dynamic Aperture ◽  
Electron Orbit ◽  
Synchrotron Light

The performance of the far-infrared (FIR) beamline of the 6 MeV tabletop synchrotron light source MIRRORCLE-6FIR dedicated to far-infrared spectroscopy is presented. MIRRORCLE-6FIR is equipped with a perfectly circular optical system (PhSR) placed around the 1 m-long circumference electron orbit. To illustrate the facility of this light source, the FIR output as well as its spectra were measured. The optimum optical system was designed by using the ray-tracing simulation code ZEMAX. The measured FIR intensity with the PhSR in place is about five times higher than that without the PhSR, which is in good agreement with the simulation results. The MIRRORCLE-6FIR spectral flux is compared with a standard thermal source and is found to be 1000 times greater than that from a typical thermal source at ∼15 cm−1. It is also observed that the MIRRORCLE-6FIR radiation has a highly coherent nature. The broadband infrared allows the facility to reach the spectral range from 10 cm−1 to 100 cm−1. MIRRORCLE-6FIR, owing to a large beam current, the PhSR mirror system, a large dynamic aperture and small ring energy, can deliver a bright flux of photons in the FIR/THz region useful for broadband spectroscopy.

Far-IR/THz Spectroscopy Beamline MIRRORCLE-6FIR at SLLS of Ritsumeikan University

2008 ◽  
Vol 1 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Md. Monirul Haque ◽  
H. Yamada ◽  
A. Moon ◽  
M. Yamada
Keyword(s):  
Synchrotron Radiation ◽  
Ray Tracing ◽  
Far Infrared ◽  
Thz Spectroscopy ◽  
Synchrotron Radiation Beam ◽  
Science Center ◽  
Simulation Code ◽  
Radiation Beam ◽  
Electron Orbit ◽  
Synchrotron Light

A new beamline, MIRRORCLE-6FIR for far infrared-terahertz (THZ) spectroscopy (FIRS) has been recently constructed at the synchrotron light life science center (SLLS) of Ritsumeikan University.  An exactly circular optics with vertical angle has been employed as the first mirror which collects synchrotron radiation (SR) photons emitted into 2π of a circular electron orbit of length 1 m only. An exit opening on its surface can extract SR photons up to 264 mrad in horizontal and 198 mrad in vertical. The optimum optical system has been determined by using ray trace simulation code ZEMAX. The purpose is to develop an FIRS beamline with high power FIR. The design of the beamline optics with the results of its ray-tracing are reported in this article.Keywords: MIRRORCLE; Synchrotron radiation; Beam line; Ray-tracing; Terahertz; Far infrared spectroscopy.  © 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.  DOI: 10.3329/jsr.v1i1.1133 

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