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Title: Development of a cryogenic hydrogen microjet for high-intensity, high-repetition rate experiments

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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Fusion Energy Sciences (FES); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0034-6748
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 11; Conference: Contributed to the 21st Topical Conference on High-Temperature Plasma Diagnostics, 5-9 Jun 2016 Madison, Wisconsin, USA
Country of Publication:
United States

Citation Formats

Kim, J.B., Gode, S., Glenzer, S., and /SLAC. Development of a cryogenic hydrogen microjet for high-intensity, high-repetition rate experiments. United States: N. p., 2017. Web. doi:10.1063/1.4961089.
Kim, J.B., Gode, S., Glenzer, S., & /SLAC. Development of a cryogenic hydrogen microjet for high-intensity, high-repetition rate experiments. United States. doi:10.1063/1.4961089.
Kim, J.B., Gode, S., Glenzer, S., and /SLAC. 2017. "Development of a cryogenic hydrogen microjet for high-intensity, high-repetition rate experiments". United States. doi:10.1063/1.4961089.
title = {Development of a cryogenic hydrogen microjet for high-intensity, high-repetition rate experiments},
author = {Kim, J.B. and Gode, S. and Glenzer, S. and /SLAC},
abstractNote = {},
doi = {10.1063/1.4961089},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = 2017,
month = 5

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  • The advent of high-intensity, high-repetition-rate lasers has led to the need for replenishing targets of interest for high energy density sciences. We describe the design and characterization of a cryogenic microjet source, which can deliver a continuous stream of liquid hydrogen with a diameter of a few microns. The jet has been imaged at 1 μm resolution by shadowgraphy with a short pulse laser. In conclusion, the pointing stability has been measured at well below a mrad, for a stable free-standing filament of solid-density hydrogen.
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  • The two basic components in pulsed-power technology are capacitors and switches. In order to develop these high-voltage components, a unique laboratory has been constructed using state-of-the-art diagnostic and shielding techniques. The laboratory is comprised of three basic systems: charging systems, (2) diagnostic systems, and (3) grounding and shielding systems.
  • Many applications in material science, chemistry, and atomic physics require an x-ray source that has a repetition rate of 1 Hz to a few kHz. In these fields, a very wide range of photon energies is of interest. One application is time-resolved surface photoelectron spectroscopy and microscopy where low energy (< 1{mu}J) pulses are required to avoid space charge effects but high-repetition rates ({approx} kHz) provide the high average power which is needed to obtain the desired resolution. In pump-probe experiments, it is desirable to have the repetition rate of the x-ray source be comparable to the repetition rate ofmore » the corresponding IR, optical, or UV laser. We show that the very high-repetition rate of synchrotrons (1--1000 MHz) results in an inefficient use of x rays for these types of experiments and that a kHz repetition rate x-ray laser would be an excellent source for many experiments. For some applications, a slower repetition rate of order 1 Hz is adequate provide the energy per pulse is larger ({approx}1 mJ). For example, in photoelectron spectroscopy of free clusters, an x-ray laser can provide the required large number of nearly monoenergetic photons during the short time the clusters can be probed in each formation cycle. In the context of source development, we discuss conventional collisional x-ray laser schemes with mJ output pulses that can operate at Hz repetition rates using a high average power driving laser. The near term prospects for high-repetition rate x-ray lasing for photon energies below 100 eV are very good with higher energy capabilities expected in the future. In addition, prospects of table-top size x-ray lasers with kHz repetition rates are presented.« less