The cryogenic system for the Spallation Neutron Source (SNS) is designed by Jefferson Laboratory (JLab) personnel and is based on the existing JLab facility. Our task is to use the JLab control system design [2] as much as practical while remaining consistent with SNS control system standards. Some aspects of the systems are very similar, including equipment to be controlled, the need for PID l...

Accurate and rapid noise-temperature measurements are critical to the modeling and development of high electron mobility transistor (HEMT) cryogenically cooled amplifiers. Four different techniques have been used in the laboratory to make noise-temperature measurements of cryogenically cooled amplifiers, and each of these is described below. Following this, the cryogenic pad method, the method ...

Pressure generation at cryogenic temperatures presents a problem for a wide array of experimental techniques, particularly neutron studies due to the volume of sample required. We present a novel, compact pressure cell with a large sample volume in which load is generated by a bellow. Using a supply of helium gas up to a pressure of 350 bar, a load of up to 78 kN is generated with leak-free ope...

Biological sample-preparation procedures have been developed for imaging human chromosomes under cryogenic conditions. A new experimental setup, developed for imaging frozen samples using beamline I13 at Diamond Light Source, is described. This manuscript describes the equipment and experimental procedures as well as the authors' first ptychographic reconstructions using X-rays.

This document, originating within the national laboratories and their industrial collaborators, presents a series of suggestions for research and development pertaining to cryogenics. Appendix A is a tabulation of the steering committee members who participated in the development of this document. The editors have primarily used the materials and discussions provided by the steering committee a...

Abstract DESY is planning to upgrade its current storage ring PETRA III into the ultra-low emittance photon source IV. The H6BA cell design for IV lattice will allow insertion devices of up 4 m length in standard straight sections. In order some beamlines not only benefit from performance improvements by machine but also undulators, we started looking using advanced undulator schemes as well. W...

Cryogenic electron microscopy (cryo-EM) is a powerful tool for imaging liquid and semiliquid systems. While cryogenic transmission electron microscopy (cryo-TEM) is a standard technique in many fields, cryogenic scanning electron microscopy (cryo-SEM) is still not that widely used and is far less developed. The vast majority of systems under investigation by cryo-EM involve either water or orga...

A compact minicryostat has been well adapted on the hard x-ray microprobe ID22 of the European Synchrotron Radiation Facility. For variable low-temperature investigations, its special technical design provides precise scanning microscopy and allows easy access for multiple detection modes. Based on x-ray excited optical luminescence technique on the micrometer scale, details of the equipment, i...