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Showing 1 to 12 of 14934 entries
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Design verification of large time constant thermal shields for optical reference cavities.

The Review of scientific instruments

Zhang J, Wu W, Shi XH, Zeng XY, Deng K, Lu ZH.
PMID: 26931831
Rev Sci Instrum. 2016 Feb;87(2):023104. doi: 10.1063/1.4941718.

In order to achieve high frequency stability in ultra-stable lasers, the Fabry-Pérot reference cavities shall be put inside vacuum chambers with large thermal time constants to reduce the sensitivity to external temperature fluctuations. Currently, the determination of thermal time...

Fast resonant target vibrating wire scanner for photon beam.

The Review of scientific instruments

Arutunian SG, Chung M, Harutyunyan GS, Margaryan AV, Lazareva EG, Lazarev LM, Shahinyan LA.
PMID: 26931835
Rev Sci Instrum. 2016 Feb;87(2):023108. doi: 10.1063/1.4941837.

We propose a new type of wire scanner for beam profile measurements, based on the use of a vibrating wire as a scattering target. Synchronous measurements with the wire oscillation allow to detect only the signal coming from the...

Direct single-mode fibre-coupled miniature White cell for laser absorption spectroscopy.

The Review of scientific instruments

Kühnreich B, Höh M, Wagner S, Ebert V.
PMID: 26931838
Rev Sci Instrum. 2016 Feb;87(2):023111. doi: 10.1063/1.4941748.

We present the design, setup, and characterization of a new lens-free fibre-coupled miniature White cell for extractive gas analysis using direct tunable diode laser absorption spectroscopy (dTDLAS). The construction of this cell is based on a modified White cell...

Online beam energy measurement of Beijing electron positron collider II linear accelerator.

The Review of scientific instruments

Wang S, Iqbal M, Liu R, Chi Y.
PMID: 26931839
Rev Sci Instrum. 2016 Feb;87(2):023301. doi: 10.1063/1.4941680.

This paper describes online beam energy measurement of Beijing Electron Positron Collider upgraded version II linear accelerator (linac) adequately. It presents the calculation formula, gives the error analysis in detail, discusses the realization in practice, and makes some verification....

Development of particle characteristics diagnosis system for nanoparticle analysis in vacuum.

The Review of scientific instruments

Kim D, Mun J, Kim H, Yun JY, Kim YJ, Kim T, Kim T, Kang SW.
PMID: 26931842
Rev Sci Instrum. 2016 Feb;87(2):023304. doi: 10.1063/1.4942247.

A particle characteristics diagnosis system (PCDS) was developed to measure nano-sized particle properties by a combination of particle beam mass spectrometry, scanning electron microscopy (SEM), and energy dispersive x-ray spectroscopy (EDS). It allows us to measure the size distributions...

Feedback system for divertor impurity seeding based on real-time measurements of surface heat flux in the Alcator C-Mod tokamak.

The Review of scientific instruments

Brunner D, Burke W, Kuang AQ, LaBombard B, Lipschultz B, Wolfe S.
PMID: 26931846
Rev Sci Instrum. 2016 Feb;87(2):023504. doi: 10.1063/1.4941047.

Mitigation of the intense heat flux to the divertor is one of the outstanding problems in fusion energy. One technique that has shown promise is impurity seeding, i.e., the injection of low-Z gaseous impurities (typically N2 or Ne) to...

Detecting divertor damage during steady state operation of Wendelstein 7-X from thermographic measurements.

The Review of scientific instruments

Rodatos A, Greuner H, Jakubowski MW, Boscary J, Wurden GA, Pedersen TS, König R.
PMID: 26931848
Rev Sci Instrum. 2016 Feb;87(2):023506. doi: 10.1063/1.4941717.

Wendelstein 7-X (W7-X) aims to demonstrate the reactor capability of the stellarator concept, by creating plasmas with pulse lengths of up to 30 min at a heating power of up to 10 MW. The divertor plasma facing components will...

A megawatt solid-state modulator for high repetition rate pulse generation.

The Review of scientific instruments

Wang Y, Pribyl P, Gekelman W.
PMID: 26931851
Rev Sci Instrum. 2016 Feb;87(2):023509. doi: 10.1063/1.4941678.

A novel solid-state modulator capable of generating rapid consecutive power pulses is constructed to facilitate experiments on plasma interaction with high power microwave pulses. The modulator is designed to output a 100 kHz tone burst, which consists of up...

Implementation of a new iterative learning control algorithm on real data.

The Review of scientific instruments

Zamanian H, Koohi A.
PMID: 26931852
Rev Sci Instrum. 2016 Feb;87(2):023510. doi: 10.1063/1.4942511.

In this paper, a newly presented approach is proposed for closed-loop automatic tuning of a proportional integral derivative (PID) controller based on iterative learning control (ILC) algorithm. A modified ILC scheme iteratively changes the control signal by adjusting it....

Scanning magnetoresistive microscopy: An advanced characterization tool for magnetic nanosystems.

The Review of scientific instruments

Mitin D, Grobis M, Albrecht M.
PMID: 26931856
Rev Sci Instrum. 2016 Feb;87(2):023703. doi: 10.1063/1.4941292.

An advanced scanning magnetoresistive microscopy (SMRM) - a robust magnetic imaging and probing technique - will be presented, which utilizes state-of-the-art recording heads of a hard disk drive as sensors. The spatial resolution of modern tunneling magnetoresistive sensors is...

Developing of an environmental cell TEM holder for dynamic in situ observation.

The Review of scientific instruments

Bataineh KM.
PMID: 26931858
Rev Sci Instrum. 2016 Feb;87(2):023705. doi: 10.1063/1.4942245.

This paper deals with the subject of "in situ" development of environmental-transmission electron microscope (E-TEM) holder assemblies. In E-TEM, the sample is continuously subjected to gases as opposed to conventional TEM where the sample is under high vacuum. E-TEM...

Photothermal method for absorption measurements in anisotropic crystals.

The Review of scientific instruments

Stubenvoll M, Schäfer B, Mann K, Novak O.
PMID: 26931863
Rev Sci Instrum. 2016 Feb;87(2):023904. doi: 10.1063/1.4941662.

A measurement system for quantitative determination of both surface and bulk contributions to the photo-thermal absorption has been extended to anisotropic optical media. It bases upon a highly sensitive Hartmann-Shack wavefront sensor, accomplishing precise on-line monitoring of wavefront deformations...

Showing 1 to 12 of 14934 entries