We demonstrate all-optical sympathetic cooling of a laser-trapped microsphere to sub-Kelvin temperatures, mediate by optical binding feedback-cooled adjacent particle. Our study opens prospects for multi-particle quantum entanglement and sensing in levitated optomechanics.

Wake fields excited in a small gap of a vacuum chamber by ampere beams can have enough amplitude to heat the chamber. The electric component of these fields can be above the arcing limit. Usually flange connections in a vacuum chamber contain a vacuum gasket and an inner RF gasket. If a small gap occurs between the RF gasket and flange surface, wake fields can heat the flanges. The flanges are ...

Auger electron spectroscopy and thermoresistive methods are used to study the physical processes leading gas cooling of heated molybdenum filaments in a wide temperature range 350-1300 K pressures 760-10 -3 Torr, corresponding operating Pirani-type vacuum sensor. Nitrogen was as gas. It is shown that nitrogen atoms chemisorbed on surface do not contribute cooling, which occurs only due physisor...

There is growing interest to explore the long-wavelength X-ray domain for macromolecular crystallography (MX) experiments but there are a number of practical issues that make these experiments difficult to perform. In this article we study several aspects related to cooling a protein crystal in a vacuum environment. We investigated thermal contact conductance (TCC) of copper-copper joints and d...

A prototype of a muffin-tin accelerating structure operating at 32 times the SLAC frequency (2.856 GHz) was built for research in high gradient acceleration. A traveling-wave design with single input and output feeds was chosen for the prototype which was fabricated by wire electrodischarge machining. Features of the mechanical design for the prototype are described. Design improvements are pre...

This paper presents the fabrication process of custom-made mouthguard with added features of air flow channel by using rapid tooling approach. Impression process was conducted in order to produce dental stone that will be used in thermoforming process to fabricate the custom-made mouthguard. Computer-aided design (CAD) were utilized to prepare the air flow channel’s design before attaching it a...

Solar heat driven cooling systems are an attractive concept. The need for cooling is associated with high ambient temperatures. Ejector based cooling systems have been in existence for some time but have not gained widespread use due to their low performance and difficulty of control. Furthermore, although ejectors are well suited to steady state operation, they do not couple well to varying so...