scholarly journals A shutter design for time domain studies using synchrotron radiation at the Advanced Photon Source

1992 ◽  
Vol 63 (1) ◽  
pp. 1172-1175 ◽  
Author(s):  
J. R. Norris ◽  
M. K. Bowman ◽  
L. Chen ◽  
J. Tang ◽  
M. C. Thurnauer ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Time Domain ◽  
Photon Source

Evaluation of an elliptically polarized undulator for the future Taiwan Photon Source

2021 ◽  
Vol 16 (12) ◽  
pp. P12017
Author(s):  
H.-W. Luo ◽  
T.-Y. Chung ◽  
C.-H. Lee ◽  
C.-S. Hwang
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Synchrotron Radiation ◽  
Transverse Field ◽  
Longitudinal Direction ◽  
X Ray ◽  
Elliptically Polarized ◽  
Transverse Position ◽  
Photon Source ◽  
Field Integral

Abstract The resonant photon energy of an adjustable-phase undulator (APU) is varied with the relative motion of the magnet arrays along the longitudinal direction. There exists, however, a transverse field gradient (TFG) of order 100 T/m in an APU of small gap (∼10 mm). Whereas the TFG might affect the electron beam as it contributes to the dynamic field integral and the radiation integrals, the TFG might also degrade the performance of the synchrotron radiation due to the transverse position-dependent magnetic field. The effects of the TFG on the present Taiwan Photon Source (TPS) and future TPS-upgraded are analyzed to investigate the feasibility of an APU that operates in the soft x-ray region.

scholarly journals A Multi-Anvil, High-Pressure Facility for Synchrotron Radiation Research at GeoSoilEnviroCARS at the Advanced Photon Source.

1998 ◽  
Vol 7 ◽  
pp. 1490-1495 ◽  
Author(s):  
Yanbin Wang ◽  
Mark Rivers ◽  
Stephen Sutton ◽  
Peter Eng ◽  
Guoyin Shen ◽  
...  
Keyword(s):  
High Pressure ◽  
Synchrotron Radiation ◽  
Radiation Research ◽  
Photon Source

A novel precision bender system for focusing mirrors

2010 ◽  
Vol 1 (MEDSI-6) ◽  
Author(s):  
E. Trakhtenberg ◽  
J. Collins ◽  
O. Schmidt
Keyword(s):  
Synchrotron Radiation ◽  
System Design ◽  
Atmospheric Pressure ◽  
Small Diameter ◽  
Stepper Motor ◽  
Prototype System ◽  
Test Results ◽  
Design Changes ◽  
Photon Source ◽  
Better Than

A novel mirror bender system utilizing cam-shaft mover (CSM) with 100 µm eccentricity was designed and successfully tested. The system was initially tested and characterized in the laboratory, and then later the performance was verified using the Advanced Photon Source synchrotron radiation source. The force from the two separate CSMs is translated to both ends of a mirror through a small-diameter bellows feed-through. The system uses an internal spring assembly to compensate for atmospheric pressure. A compact gear box with 10:1 ratio between the stepper motor and cam shaft is used to increase the precision of the bender system. This bender system is equipped with a precise rotary potentiometer and load cell for feedback. A system resolution better than 0.2 µm per step was achieved. This bender system was designed as a separate unit, is very compact and can be used to bend a mirror in both the vertical and horizontal planes. Details of the system design, changes made from the prototype system to the production unit and test results are presented here.

PHOTOEMISSION BEAMLINE AT THE SIAM PHOTON LABORATORY

2001 ◽  
Vol 08 (05) ◽  
pp. 497-500 ◽  
Author(s):  
PRAYOON SONGSIRIRITTHIGUL ◽  
W. PAIRSUWAN ◽  
T. ISHII ◽  
A. KAKIZAKI
Keyword(s):  
High Resolution ◽  
Synchrotron Radiation ◽  
Electronic Structures ◽  
X Ray ◽  
Surfaces And Interfaces ◽  
Photon Source

This report describes the first beamline for the Siam Photon Laboratory. The beamline has been designed to utilize synchrotron radiation in the VUV and soft X-ray regions generated by the Siam Photon Source. The beamline will be used for angle-resolved and high-resolution photoemission experiments to investigate electronic structures of surfaces and interfaces of solids.

scholarly journals Cross-Correlation of THz Pulses from the Electron Storage Ring BESSY II

2020 ◽  
Vol 5 (2) ◽  
pp. 24
Author(s):  
Ulrich Schade ◽  
Peter Kuske ◽  
Jongseok Lee ◽  
Barbara Marchetti ◽  
Michele Ortolani
Keyword(s):  
Synchrotron Radiation ◽  
Storage Ring ◽  
Time Domain ◽  
Cross Correlation ◽  
Bunch Length ◽  
Pump Probe ◽  
Electron Storage ◽  
Coherent Synchrotron Radiation ◽  
Longitudinal Length ◽  
The Time Domain

Coherent synchrotron radiation from an electron storage ring is observed in the THz spectral range when the bunch length is shortened down to the sub-mm-range. With increasing stored current, the bunch becomes longitudinally unstable and modulates the THz emission in the time domain. These micro-instabilities are investigated at the electron storage ring BESSY II by means of cross-correlation of the THz fields from successive bunches. The investigations allow deriving the longitudinal length scale of the micro bunch fluctuations and show that it grows faster than the current-dependent bunch length. Our findings will help to set the limits for the possible time resolution for pump-probe experiments achieved with coherent THz synchrotron radiation from a storage ring.

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