BEAM OPTICS SIMULATION OF RARE-RI RING AT RI BEAM FACTORY IN RIKEN

2009 ◽  
Vol 18 (02) ◽  
pp. 498-504 ◽  
Author(s):  
I. ARAI ◽  
A. OZAWA ◽  
Y. YASUDA ◽  
T. FUJINAWA ◽  
N. FUKUNISHI ◽  
...  
Keyword(s):  
Storage Ring ◽  
Computational Time ◽  
Beam Optics ◽  
Momentum Range ◽  
Beam Emittance ◽  
Magnetic Sector ◽  
Beam Trajectory ◽  
Ri Beam ◽  
The Magnetic Field ◽  
Total Circulation

The cyclotron-like storage ring dedicated to Rare-RI Ring project consists of 6 magnetic sectors and 6 straight sections, having a circumference of 56.13 m. The magnetic sector works for both bending and focusing. The total circulation is assumed to be 1,000 turns. Over the momentum range from -1% to +1% in ∆p/p, the required isochronisity is 10-6 while the beam emittance is sevaral tens of π mm-mrad. To examine the design of cyclotron-like storage ring and fix its parameters, we have developed a high precision beam optics simulation. To achieve the precision as high as possible within a feasible computational time, we have adopted a geometrical tracking assuming a circular orbit for a small spatial segment. For that purpose, it is enough that the magnetic sector is divided into 150 sub-sectors in calculation. In each sub-sector, the magnetic field is given as a function of radial position but uniform around the vicinity of beam trajectory. The beam trajectory is evaluated in 4th order Runge-Kutta algorithm. Finally, we have achieved a precision of 10-9 in ∆T/T and a computational time of 1.8 sec on a typical PC server for ray tracing of single particle undergoing a circulation of 1,000 turns.

Accelerator-based X-ray sources: synchrotron radiation, X-ray free electron lasers and beyond

2019 ◽  
Vol 377 (2147) ◽  
pp. 20180231 ◽  
Author(s):  
Tetsuya Ishikawa
Keyword(s):  
Synchrotron Radiation ◽  
Storage Ring ◽  
Free Electron ◽  
Continuous Wave ◽  
Transitional Period ◽  
Light Sources ◽  
X Rays ◽  
Free Electron Lasers ◽  
Beam Emittance ◽  
X Ray

The evolution of synchrotron radiation (SR) sources and related sciences is discussed to explain the ‘generation’ of the SR sources. Most of the contemporary SR sources belong to the third generation, where the storage rings are optimized for the use of undulator radiation. The undulator development allowed to reduction of the electron energy of the storage ring necessary for delivering 10 keV X-rays from the initial 6–8 GeV to the current 3 Gev. Now is the transitional period from the double-bend-achromat lattice-based storage ring to the multi-bend-achromat lattice to achieve much smaller electron beam emittance. Free electron lasers are the other important accelerator-based light sources which recently reached hard X-ray regime by using self-amplified spontaneous emission scheme. Future accelerator-based X-ray sources should be continuous wave X-ray free electron lasers and pulsed X-ray free electron lasers. Some pathways to reach the future case are discussed. This article is part of the theme issue ‘Fifty years of synchrotron science: achievements and opportunities’.

The Siam Photon Laboratory

1998 ◽  
Vol 5 (3) ◽  
pp. 1173-1175 ◽  
Author(s):  
Weerapong Pairsuwan ◽  
Takehiko Ishii
Keyword(s):  
Synchrotron Radiation ◽  
Engineering Design ◽  
Light Source ◽  
Storage Ring ◽  
Research Project ◽  
Design Work ◽  
Beam Emittance ◽  
Detailed Design ◽  
Experimental Hall ◽  
Radiation Research

A synchrotron radiation research project, the Siam Photon Project, is underway in Thailand. The light source used in the project is the modified SORTEC storage ring. The project and simple aspects of the light source are described. The detailed design of the building to accommodate the experimental hall and the light source has been accomplished and the construction will start soon. The engineering design work of the machine components necessary for the modifications to reduce the beam emittance and to make the installation of insertion devices possible is underway.

The Calculation of the Magnetic Field Produced by an Arbitrary Shaped Current-Carrying Wire in its Plane

2013 ◽  
Vol 756-759 ◽  
pp. 3687-3691 ◽  
Author(s):  
Zhou Yu ◽  
Chang Han Xiao ◽  
Huan Wang ◽  
Yao Zhong Zhou
Keyword(s):  
Magnetic Field ◽  
Straight Line Segment ◽  
Computational Time ◽  
Improved Method ◽  
New Approach ◽  
Line Segments ◽  
Steady Current ◽  
Straight Line ◽  
Coordinate Rotation ◽  
The Magnetic Field

Instead of performing the integration explicitly to calculate the magnetic field from an arbitrary shaped wire, an improved method was proposed. The magnetic field generated by a straight line segment carrying steady current was calculated based on the Biot-Savart law. The new approach is to break the wire down into a number of straight line segments in its plane. According to the principle of vector superposition and coordinate rotation, the magnetic field from the complete current wire can then be calculated by summing the contribution from each of the separate straight line pieces. The simulation results show that the proposed numerical method has high accuracy and faster computational time and is efficient and convenient to the application in projects.

EFFECTS OF THE WIGGLER ON THE HEFEI LIGHT SOURCE STORAGE RING

2009 ◽  
Vol 24 (05) ◽  
pp. 1057-1067
Author(s):  
HE ZHANG ◽  
MARTIN BERZ
Keyword(s):  
Magnetic Field ◽  
Light Source ◽  
Storage Ring ◽  
Field Model ◽  
Beta Function ◽  
Nonlinear Effects ◽  
Magnetic Field Model ◽  
Dynamic Aperture ◽  
Linear Effects ◽  
The Magnetic Field

The Hefei light source (HLS) is a second generation synchrotron radiation light source, in which a superconducting wiggler is installed and operating. The effects of the wiggler on the beam dynamics on the HLS storage ring are studied, in order to make sure the wiggler can operate properly when the ring is working in the high brilliance mode. We generate a model of the magnetic field in the midplane of the wiggler. The 3D magnetic field model is also builded up by COSY infinity 9.0. Both the linear and nonlinear effects of the wiggler are discussed. The vertical tune is changed from 2.535 to 2.567 and the vertical beta function is heavily distorted, while a symplectic tracking study shows the dynamic aperture is only slightly affected by the wiggler. And the wiggler should be able to run on the high brilliance mode after the linear effects get compensated.

scholarly journals Magnet design for a low-emittance storage ring

2014 ◽  
Vol 21 (5) ◽  
pp. 884-903 ◽  
Author(s):  
Martin Johansson ◽  
Bengt Anderberg ◽  
Lars-Johan Lindgren
Keyword(s):  
Storage Ring ◽  
Field Measurement ◽  
Block Design ◽  
Point Of View ◽  
Cnc Machining ◽  
Design Solution ◽  
Magnetic Field Measurement ◽  
Fixed Cost ◽  
Beam Emittance ◽  
Magnet Design

The MAX IV 3 GeV storage ring, currently under construction, pursues the goal of low electron beam emittance by using a multi-bend achromat magnet lattice, which is realised by having several consecutive magnet elements precision-machined out of a common solid iron block, 2.3–3.4 m long. With this magnet design solution, instead of having 1320 individual magnets, the MAX IV 3 GeV storage ring is built up using 140 integrated `magnet block' units, containing all these magnet elements. Major features of this magnet block design are compactness, vibration stability and that the alignment of magnet elements within each unit is given by the mechanical accuracy of the CNC machining rather than individual field measurement and adjustment. This article presents practical engineering details of implementing this magnet design solution, and mechanical + magnetic field measurement results from the magnet production series. At the time of writing (spring 2014), the production series, which is totally outsourced to industry, is roughly half way through, with mechanical/magnetic QA conforming to specifications. It is the conclusion of the authors that the MAX IV magnet block concept, which has sometimes been described as new or innovative, is from a manufacturing point of view simply a collection of known mature production methods and measurement procedures, which can be executed at fixed cost with a low level of risk.

scholarly journals Computation of the main and fringe fields for the electrostatic quadrupoles of the muon g − 2 storage ring

2019 ◽  
Vol 34 (36) ◽  
pp. 1942041 ◽  
Author(s):  
Eremey Valetov ◽  
Martin Berz ◽  
Kyoko Makino
Keyword(s):  
Conformal Mapping ◽  
Storage Ring ◽  
Optical Element ◽  
Mapping Method ◽  
Effective Field ◽  
Beam Optics ◽  
Optical Elements ◽  
Conformal Mapping Method ◽  
Fringe Fields ◽  
Remarkable Advantage

We developed a highly accurate and fully Maxwellian conformal mapping method for calculation of main fields of electrostatic particle optical elements. A remarkable advantage of this method is the possibility of rapid recalculations with geometric asymmetries and mispowered plates. We used this conformal mapping method to calculate the multipole terms of the high voltage quadrupoles in the storage ring of the Muon [Formula: see text] Experiment (FNAL-E-0989). Next, we demonstrate that an effect where the observed tunes correspond to a voltage that is about [Formula: see text] higher compared to the voltage to which the Muon [Formula: see text] quadrupoles are set is explained by the conceptual and quantitative differences between the beam optics quadrupole voltage and the quadrupole voltage at the plates. Completing the methodological framework for field computations, we present a method for extracting multipole strength falloffs of a particle optical element from a set of Fourier mode falloffs. We calculated the quadrupole strength falloff and its effective field boundary (EFB) for the Muon [Formula: see text] quadrupole, which has explained the experimentally measured tunes, while simple estimates based on a linear model exhibited discrepancies up to [Formula: see text].

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