scholarly journals Simulation of an electrostatic quadrupole quadruplet focusing lens system for MeV multi-ion micro-beam

2019 ◽  
Author(s):  
V. A. Chirayath ◽  
H. Arya ◽  
M. Jin ◽  
A. H. Weiss ◽  
G. A. Glass ◽  
...  
Keyword(s):  
Lens System ◽  
Focusing Lens ◽  
Electrostatic Quadrupole

Dotted-Array Plasma Production by Using a Line-Focusing Lens System with Segmented Prism Array for Compact X-ray Laser Experiments

2000 ◽  
Vol 39 (Part 1, No. 9A) ◽  
pp. 5268-5272 ◽  
Author(s):  
Naohiro Yamaguchi ◽  
Chiemi Fujikawa ◽  
Tadayuki Ohchi ◽  
Tamio Hara
Keyword(s):  
Lens System ◽  
Plasma Production ◽  
X Ray ◽  
Laser Experiments ◽  
Focusing Lens

Analysis of Reflectance and Transmittance Measurements on Absorbing and Scattering Small Samples Using a Modified Integrating Sphere Setup

2009 ◽  
Vol 63 (8) ◽  
pp. 879-888 ◽  
Author(s):  
K. D. Jernshøj ◽  
S. Hassing
Keyword(s):  
Test Sample ◽  
Small Samples ◽  
Integrating Sphere ◽  
Lens System ◽  
Cross Sectional ◽  
Experimental Errors ◽  
Focusing Lens ◽  
Experimental Challenge

The aim of the present paper is to analyze reflectance and transmittance measurements on small scattering and absorbing samples. The long term goal is to perform quantitative, spectroscopic in vivo measurements of pigments in small samples of plant material. Small samples such as small leaves constitute a special experimental challenge in cases in which the sample beam has a larger cross-sectional area than the sample. The experimental errors introduced when measuring reflectance and transmittance on small absorbing and scattering samples are investigated theoretically and experimentally by using a blue polyester sample as an appropriate test sample. The experiments are performed with either a mask or a lens setup combined with a mask inserted in the sample beam. In particular, the errors introduced in the reflectance measurements can be very large and larger than 100%. It is shown that any direct illumination of the mask must be avoided. To obtain more accurate values for the reflection coefficient it is necessary to combine the mask with a focusing lens system, adjust the mask and sample very carefully, and choose the ratio between the aperture of the mask and the beam area as large as possible. In the case of transmittance measurements, it is shown that the combination of a special sample fixture and a lens system gives rise to smaller errors compared to the errors introduced by the mask alone or the mask combined with a focusing lens system.

New focusing lens system and tolerance analysis for near field recording system

2002 ◽  
Author(s):  
Jun Hee Lee ◽  
Hyoung Kil Yoon ◽  
Dong Kyun Kang ◽  
Dae gab Gweon ◽  
Sang Tae Lee
Keyword(s):  
Near Field ◽  
Tolerance Analysis ◽  
Recording System ◽  
Lens System ◽  
Field Recording ◽  
Focusing Lens

A refractive focusing lens system for small-angle neutron scattering

2005 ◽  
Vol 38 (6) ◽  
pp. 979-987 ◽  
Author(s):  
D. F. R. Mildner ◽  
B. Hammouda ◽  
S. R. Kline
Keyword(s):  
Small Angle Neutron Scattering ◽  
Incident Beam ◽  
Optical Quality ◽  
Lens System ◽  
Beam Spot ◽  
Neutron Optics ◽  
Theoretical Predictions ◽  
Neutron Wavelength ◽  
Focusing Lens ◽  
Sans Instrument

Simple neutron optics measurements have been performed using optical-quality concave lenses as a function of neutron wavelength on a 30 m SANS instrument. The variation in the width of the beam spot on the detector at wavelengths different from the focused condition has been observed. The movement of the beam on the detector when the centerline of the lens combination is shifted from the incident-beam centerline has also been observed. These results are compared with theoretical predictions.

scholarly journals RFQ final-focusing lens at the GSI

1991 ◽  
Vol 9 (4) ◽  
pp. 863-867
Author(s):  
B. Heimrich ◽  
H. J. Laue ◽  
H. Wollnik
Keyword(s):  
Radio Frequency ◽  
Dense Matter ◽  
Quadrupole Doublet ◽  
Heavy Ion ◽  
Ion Beams ◽  
Beam Power ◽  
Radio Frequency Quadrupole ◽  
Small Spot ◽  
Focusing Lens ◽  
Electrostatic Quadrupole

For first investigations of hot dense matter produced by intense heavy-ion beams we built an electrostatic quadrupole doublet that focused Ar+and Kr+ ions of 45 keV/amu after acceleration through the radio frequency quadrupole (RFQ) accelerator at the GSI onto a small spot of approximate area 1 mm2. This beam then deposited a specific beam power of about 1.5 GW/g to targets.

Sign in / Sign up

Export Citation Format

Share Document