Ultra-low coefficient of thermal expansion (CTE) is an elusive property, and narrow temperature ranges of operation and poor mechanical properties limit the use of conventional materials with low CTE. We structured a periodic micro-array of bi-metallic cells to demonstrate ultra-low effective CTE with a wide temperature range. These engineered tunable CTE thin film can be applied to minimize th...

We study the feasibility of generating femtosecond duration Free-Electron Laser with a variable photon energy from 1.5 to 48 keV, using an electron bunch with the same characteristics of the LINAC Coherent Light Source (LCLS) bunch, and a planar undulator with additional focusing. We assume that the electron bunch energy can be changed, and the undulator has a variable gap, allowing a variable ...

Pulsed ultra-wideband (UWB) transceivers offer the potential for ultra-low-energy/bit operation because the signals are inherently duty-cycled. By eliminating components with long startup times, such as a phase-locked loop, all components in a pulsed-UWB transceiver can be disabled during the interval between pulses. This work focuses on an all-digital, pulsed-UWB transmitter that requires no a...

In this paper the results of an extensive literature study on Ultra-Low-Power (ULP) electronics is presented. It discusses an emerging application area, which is characterised by very strong power requirements, called ULP electronics. It aims to evaluate possible applications to derive the requirements that emerging trend in circuits must meet and to recognise as far as possible the challenges,...

This paper presents a new family of logic gates for ultra low energy computing using pulsed power CMOS logic. The logic gates use the principles of adiabatic switching principle and results show that in typical cases 90% of the energy can be recovered with operating frequency around IMHz. Constant capacitance condition is enforced in our designs so that signals' energy can be efficiently recycl...

OF THE DISSERTATION A New Ultra-Cold Positron Beam and Applications To Low-Energy Positron Scattering and Electron-Positron Plasmas

Electrostatic storage rings operate at very low energies in the tens of keV range and have proven to be invaluable tools for atomic and molecular physics experiments. However, earlier measurements showed strong limitations in beam intensity, a fast reduction in the stored ion current, as well as significantly reduced beam life time at higher beam intensities and as a function of the ion optical...

The Facility for Low-energy Antiproton and Ion Research (FLAIR) recently got part of the FAIR core project. A large part of the wide physics program decisively relies on new experimental techniques to cool and slow down antiprotons to 20 keV, namely on the development of an ultra-low energy electrostatic storage ring (USR). For the USR to fulfil its key role in the FLAIR project, the developmen...

Towards an Ultra-Low Energy Computation with Asynchronous Circuits by Tsung-Te Liu Doctor of Philosophy in Engineering Electrical Engineering and Computer Sciences University of California, Berkeley Professor Jan M. Rabaey, Chair Emerging biomedical applications would benefit from the availability of digital processors with substantially improved energy-efficiency. One approach to realize ultra...