Vacuum-ultraviolet refractive index of LiF and MgF_2 in the temperature range 80–300 K

Laporte, P.; Subtil, J. L.; Courbon, M.; Bon, M.; Vincent, Lucien

doi:10.1364/josa.73.001062

Cited by 42 publications

(19 citation statements)

References 22 publications

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“…The wavelengthdependent refractive index of MgF 2 at cryogenic temperatures has been adapted from ref. [11]. The expected transmission spectrum from the "Fresnel effect" alone (without any absorption or attenuation features) for normal incidence of light through the cryo-2 Transmission measurements in gaseous argon (∼ 1000 mbar and room temperature) showed a transmission of 1.0 for the whole range of the experimental setup (118 -257 nm).…”

Section: Fresnel Effectmentioning

confidence: 95%

“…Hence, more light is transmitted at the inner surfaces of the MgF2 windows, when the sample cell is filled with liquid argon. [11] is shown. The black dots show measurements and the black line shows a model fit [11] to the data.…”

Section: Fresnel Effectmentioning

confidence: 99%

“…[11] is shown. The black dots show measurements and the black line shows a model fit [11] to the data. The red (colour online) dashed-dotted curve shows the wavelength-dependent refractive index of liquid argon obtained from a density scaling of the data in figure 5 in analogue to the strategy presented in ref.…”

Section: Fresnel Effectmentioning

confidence: 99%

See 2 more Smart Citations

Attenuation measurements of vacuum ultraviolet light in liquid argon revisited

Neumeier

Dandl

Himpsl

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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Abstract. The attenuation of vacuum ultraviolet light in liquid argon in the context of its application in large liquid noble gas detectors has been studied. Compared to a previous publication several technical issues concerning transmission measurements in general are addressed and several systematic effects were quantitatively measured. Wavelength-resolved transmission measurements have been performed from the vacuum ultraviolet to the near-infrared region. On the current level of sensitivity with a length of the optical path of 11.6 cm, no xenon-related absorption effects could be observed, and pure liquid argon is fully transparent down to the short wavelength cut-off of the experimental setup at 118 nm. A lower limit for the attenuation length of pure liquid argon for its own scintillation light has been estimated to be 1.10 m based on a very conservative approach.

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Section: Fresnel Effectmentioning

confidence: 95%

Section: Fresnel Effectmentioning

confidence: 99%

See 1 more Smart Citation

Attenuation measurements of vacuum ultraviolet light in liquid argon revisited

Neumeier

Dandl

Himpsl

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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show abstract

“…For a MgF 2 crystal and a CsI photocathode with QE(E) taken from [7], T (E) from [8] and n(E) from [9], we expect 370 × 0.89 = 330 p.e./cm (figure 2). However, this QE concerns operation in reflective mode.…”

Section: Photoelectron Productionmentioning

confidence: 99%

Fast Timing for High-Rate Environments with Micromegas

et al. 2018

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The current state of the art in fast timing resolution for existing experiments is of the order of 100 ps on the time of arrival of both charged particles and electromagnetic showers. Current R&D on charged particle timing is approaching the level of 10 ps but is not primarily directed at sustained performance at high rates and under high radiation (as would be needed for HL-LHC pileup mitigation). We demonstrate a Micromegas based solution to reach this level of performance. The Micromegas acts as a photomultiplier coupled to a Cerenkovradiator front window, which produces sufficient UV photons to convert the ∼100 ps single-photoelectron jitter into a timing response of the order of 10-20 ps per incident charged particle. A prototype has been built in order to demonstrate this performance. The first laboratory tests with a pico-second laser have shown a time resolution of the order of 27 ps for ∼50 primary photoelectrons, using a bulk Micromegas readout.

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“…Sparse data exists in the available literature, with accurate measurements on infrared materials, especially at low temperature [1][2][3][4][5][6][7][8]. The situation changed recently with the development of a very accurate facility at the NASA's Goddard Space Flight Center, called CHARMS.…”

Section: Introductionmentioning

confidence: 99%

Design and development of a cryogenic high-accuracy refractometer

Spanó

Bianco²,

Toso

et al. 2008

Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation

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We present the development of a demonstration prototype for a compact and relatively cheap system capable to measure the refraction index of glasses, between 0.4 to 1.7 micron, at room and cryogenic temperatures (T=100-300 K), with an absolute precision of few parts of 10 -5 . The basic concept is the measurement of the deviation angle of monochromatic light passing through a prism sample placed in the cryogenic chamber. The precision of the measurements depends on many factors, in particular the angle measurement and the thermal stability, therefore the system can control its alignment. The main issue is the trade-off between the simplicity of the set-up and the precision of the refractive index measurement.

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Vacuum-ultraviolet refractive index of LiF and MgF_2 in the temperature range 80–300 K

Cited by 42 publications

References 22 publications

Attenuation measurements of vacuum ultraviolet light in liquid argon revisited

Attenuation measurements of vacuum ultraviolet light in liquid argon revisited

Fast Timing for High-Rate Environments with Micromegas

Design and development of a cryogenic high-accuracy refractometer

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