The energy resolution of a position sensitive spectrometer based on plane crystals

1993 ◽  
Vol 74 (3) ◽  
pp. 426-430 ◽  
Author(s):  
Z. Hu ◽  
N. De Cesare ◽  
D. Grassi ◽  
F. Murolo ◽  
M. Vigilante
Keyword(s):  
Energy Resolution ◽  
Position Sensitive

DEVELOPMENT OF A CONICAL ENERGY ANALYZER FOR ANGLE-RESOLVED PHOTOELECTRON SPECTROSCOPY

2002 ◽  
Vol 09 (01) ◽  
pp. 583-586
Author(s):  
KOTA IWASAKI ◽  
KOICHIRO MITSUKE
Keyword(s):  
Gas Phase ◽  
Energy Resolution ◽  
Photoelectron Spectroscopy ◽  
Angular Resolution ◽  
Photoelectron Spectra ◽  
Sensitive Detector ◽  
Energy Analyzer ◽  
Position Sensitive ◽  
Pass Energy ◽  
Helium Discharge

A new angle-resolving electron energy analyzer composed of a conical electrostatic prism and a position-sensitive detector was developed for gas phase photoelectron spectroscopy. The performance of the analyzer has been tested by measuring photoelectron spectra of Ar using a helium discharge lamp. The angular resolution of 3° was achieved at the pass energy E of 5.6 eV. The best energy resolution was ΔE/E = 0.043 at E = 1.4 eV .

scholarly journals Improving the energy resolution of bent crystal X-ray spectrometers with position-sensitive detectors

2014 ◽  
Vol 21 (4) ◽  
pp. 762-767 ◽  
Author(s):  
Ari-Pekka Honkanen ◽  
Roberto Verbeni ◽  
Laura Simonelli ◽  
Marco Moretti Sala ◽  
Ali Al-Zein ◽  
...  
Keyword(s):  
High Resolution ◽  
Internal Stress ◽  
Photon Energy ◽  
Energy Resolution ◽  
Preceding Paper ◽  
X Ray ◽  
Bent Crystal ◽  
Position Sensitive ◽  
Position Sensitive Detectors ◽  
Bent Crystals

Wavelength-dispersive high-resolution X-ray spectrometers often employ elastically bent crystals for the wavelength analysis. In a preceding paper [Honkanenet al.(2014).J. Synchrotron Rad.21, 104–110] a theory for quantifying the internal stress of a macroscopically large spherically curved analyser crystal was presented. Here the theory is applied to compensate for the corresponding decrease of the energy resolution. The technique is demonstrated with a Johann-type spectrometer using a spherically bent Si(660) analyser in near-backscattering geometry, where an improvement in the energy resolution from 1.0 eV down to 0.5 eV at 9.7 keV incident photon energy was observed.

High-energy resolution μ-XRF analysis by position sensitive spectrometer

2000 ◽  
Vol 45 (21) ◽  
pp. 1934-1938
Author(s):  
Zhaohui Hu ◽  
Shijie Liu ◽  
Pingsheng Liu ◽  
Guohua Feng ◽  
Yong Han
Keyword(s):  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
Xrf Analysis ◽  
Position Sensitive

Position-sensitive microcalorimeters for large-field high-energy resolution astrophysics

2003 ◽  
Author(s):  
Enectali Figueroa-Feliciano ◽  
Kevin Boyce ◽  
Jay Chervenak ◽  
Fred Finkbeiner ◽  
Rich Kelley ◽  
...  
Keyword(s):  
Energy Resolution ◽  
High Energy ◽  
Large Field ◽  
High Energy Resolution ◽  
Position Sensitive

scholarly journals Experimental energy resolution of a paracentric hemispherical deflector analyzer for different entry positions and bias simulated in SIMION

2019 ◽  
Vol 21 ◽  
pp. 100
Author(s):  
G. G. Gennarakis ◽  
T. J. M. Zouros
Keyword(s):  
Monte Carlo ◽  
Energy Resolution ◽  
Electron Optics ◽  
Entry And Exit ◽  
First Order ◽  
Fringing Field ◽  
Position Sensitive ◽  
Position Sensitive Detectors ◽  
Fringing Fields ◽  
Trajectory Simulations

Results from the simulation of a biased paracentric hemispherical deflector analyzer (HDA) with injection lens are presented. The finite differences electron optics software SIMION was used to perform Monte Carlo type trajectory simulations in an effort to investigate the focusing effects of the HDA entry and exit fringing fields which are used to improve energy resolution - a novel feature of this type of analyzer. Comparisons to recent experimental results are also presented. Biased paracentric HDAs represent a novel class of HDAs, which use the lensing action of the strong fringing fields at the HDA entry, to restore the first order focus characteristics of ideal HDAs in a controlled way. The improvement in energy resolution and transmission without the use of any additional fringing field correction electrodes is of particular interest to modern analyzers using position sensitive detectors.

scholarly journals Position and Energy Resolution of a γ-Camera based on a Position Sensitive Photomultiplier Tube

2020 ◽  
Vol 15 ◽  
pp. 172
Author(s):  
A. Polychronopoulou ◽  
D. Thanasas ◽  
N. Giokaris ◽  
A. Karabarbounis ◽  
D. Maintas ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Incident Light ◽  
Sampling Rate ◽  
Light Output ◽  
Camera System ◽  
Analog To Digital ◽  
Light Pulses ◽  
Scintillation Crystals ◽  
Current Divider ◽  
Position Sensitive

Studies of the spatial- and energy-resolution of a small field, high resolution γ-Camera system currently being developed in our laboratory are presented here. The system is based on a cylindrical Position Sensitive Photo-Multiplier Tube (HAMAMATSU R2486) with 32 crossed-wired anodes, arranged in two orthogonal groups. The anode outputs are connected to a resistive current divider network and after pre-amplification are guided to a local digitizing system. A PCI-Analog to Digital Converter card with a maximum sampling rate of 20 MHz and the rest of the Data Acquisition System is controlled by software running on the LabVIEW environment. Position and induced charge of the incident light pulses can be easily reconstructed through a variety of offline algorithms. In the first part of this study the intrinsic response of the PMT and especially its energy and position resolution is presented. The experimental procedure utilizes the controlled pulse light output of a LED guided through fiber glass directly to the PMT’s entrance. The accumulated charge distribution and charge spread as a function of the incident number of photons is studied. In the second part, the response of the integrated γ-Camera system after the application of typical scintillation crystals for 99Tc radioactive phantoms is measured and analyzed.

X-ray absorption spectroscopy in the dispersive mode with synchrotron radiation: optical considerations

1988 ◽  
Vol 21 (1) ◽  
pp. 15-22 ◽  
Author(s):  
H. Tolentino ◽  
E. Dartyge ◽  
A. Fontaine ◽  
G. Tourillon
Keyword(s):  
Absorption Spectroscopy ◽  
Energy Resolution ◽  
Energy Scale ◽  
Source Size ◽  
X Ray ◽  
Size Dependent ◽  
Scale Reliability ◽  
Position Sensitive ◽  
The Stability ◽  
X Ray Absorption

Aspects of the optics of the energy-dispersive scheme for X-ray absorption spectroscopy are discussed. The idea of a set of monochromatic focus points related to a set of local Rowland circles is introduced to account for the source-size effect on the energy resolution. It is shown that there exists an optimized location of the position-sensitive detector where the energy resolution is no longer source-size dependent. In addition, the stability of the dispersive optical system has been estimated and a 10 meV energy-scale reliability is currently achieved.

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