Polydimethylsiloxane (PDMS) microshells/beads coated onto an electrical current-carrying wire are demonstrated for on-chip, dynamic, cryogenic temperature measurement via monitoring optical whispering-gallery mode (WGM) frequency shifts. PDMS is found to be capable of supporting WGM resonance at cryogenic temperatures down to 95 K, limited by the present lab-built cryogenic working environment....

The recent introduction of silicon-germanium (SiGe) alloys has proven exceptionally promising for achieving excellent bipolar transistor performance at cryogenic temperatures, while maintaining the cost and yield advantages traditionally associated with silicon (Si) manufacturing. In this paper we review the features of silicon-germanium heterojunction bipolar transistors (SiGe HBTs) which make...

We have developed a versatile near-field microscopy platform that can operate at high magnetic fields and below liquid-helium temperatures. use this to demonstrate an extreme terahertz (THz) nanoscope operation obtain the first cryogenic magneto-THz time-domain nano-spectroscopy/imaging temperatures as low 1.8 K, of up 5 T, with 0–2 THz. Our Cryogenic Magneto-Terahertz Scattering-type Scanning ...

In a test of principle a neutron spin filter has been built, which is based on dynamic nuclear polarization (DNP) using photo-excited triplet states. This DNP method has advantages over classical concepts as the requirements for cryogenic equipment and magnets are much relaxed: the spin filter is operated in a field of 0.3 T at a temperature of about 100 K and has performed reliably over period...

The assembly of the first version of the LHC test string has now been completed and commissioned. It makes use of the prototype short straight section assembled at CERN with its quadrupole and of the first two 10 m long dipoles manufactured by industry. The LHC string will be used to study phenomena which can be observed only when the different components are assembled in a prototype LHC cell, ...

BACKGROUND Establishing a stand-alone cryogenic test stand is of vital importance to ensure the highly reliable and available operation of superconducting radio-frequency module in a synchrotron light source. Operating a cryogenic test stand relies strongly on a capability to deliver two-phase helium along long cryogenic transfer lines. A newly constructed cryogenic test stand with flexible cry...

The paper gives an overview on the test possibilities of the Cryogenic Laboratories in BREMEN and TRAUEN of the DLR Institute of Space Systems with regard to the research and development of propellant management and storage technologies for successful future launcher and advanced cryogenic upper stage systems. To satisfy the current and future need for testing and research, different test facil...

-Electrical discharge machining (EDM) process, at present is still an experience process, wherein selected parameters are often far from the optimum, and at the same time selecting optimization parameters is costly and time consuming. In this paper cryogenic treatment is used for increasing the material removal rate and lowering the tool wear rate. cryogenic treatment is a process of keeping th...

LLE Review, Volume 103 128 Introduction A high-performance “planar” Cryogenic Target Handling System has been added to LLE’s OMEGA Laser-Fusion Facility.1 Initially designed for equation of state measurements of liquefied D2, it’s versatility enables studies of Rayleigh–Taylor instabilities, shock timing, and cryogenic hohlraum performance. The system has demonstrated a shot-to-shot cycle inter...

Smirnovia iranica (Sabeti) synonym: Smirnovia turkestana (Bunge) is a deciduous perennial bushy species of the Fabaceae (Papilionaceae) family. The species grow on sand dunes of desert areas, having a deep vertical root and very long horizontal or lateral roots. They have an important role in natural vegetation of desert and sand dune stabilization. Limited growing areas, grazing due to good pa...