WorldCat Identities

RAO, T.

Overview
Works: 7 works in 7 publications in 1 language and 37 library holdings
Publication Timeline
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Most widely held works by T RAO
Multi-Alkali Photocathode Development at Brookhaven National Lab for Application in Superconducting Photoinjectors( )

1 edition published in 2006 in English and held by 6 WorldCat member libraries worldwide

The development of a suitable photocathode for use in a high average current photoinjector at temperatures ranging from 273 K down to 2 K is a subject of considerable interest, and active research. The choice of photocathode material is often a trade-off made based on the quantum efficiency of the cathode material, the tolerance to adverse vacuum conditions, and the laser wavelength needed to produce photoelectrons. In this paper an overview of the BNL work to date on CsK{sub 2}Sb photocathodes on a variety of substrates, irradiated at multiple wavelengths, and at temperatures down to 170 K will be discussed. The application of this photocathode material into a SRF photoinjector will also be discussed
Rf design and operating performance of the bnl/aes 1.3 ghz single cell superconducting rf photocathode electron gun( )

1 edition published in 2005 in English and held by 6 WorldCat member libraries worldwide

Over the past several years Advanced Energy Systems and BNL have been collaborating on the development and testing of a fully superconducting photocathode electron gun. Over the past year we have begun to realize significant results which have been published elsewhere [1]. This paper will review the RF design of the gun under test and present results of its performance under various operating conditions. Results for cavity quality factor will be presented for various operating temperatures and cavity field gradients. We will also discuss future plans for testing using this gun
SUPERCONDUCTING PHOTOCATHODES( )

1 edition published in 2005 in English and held by 6 WorldCat member libraries worldwide

We present the results of our investigation of lead and niobium as suitable photocathode materials for superconducting RF injectors. Quantum efficiencies (QE) have been measured for a range of incident photon energies and a variety of cathode preparation methods, including various lead plating techniques on a niobium substrate. The effects of operating at ambient and cryogenic temperatures and different vacuum levels on the cathode QE have also been studied
DIAMOND SECONDARY EMITTER( )

1 edition published in 2005 in English and held by 6 WorldCat member libraries worldwide

We present the design and experimental progress on the diamond secondary emitter as an electron source for high average power injectors. The design criteria for average currents up to 1 A and charge up to 20 nC are established. Secondary Electron Yield (SEY) exceeding 200 in transmission mode and 50 in emission mode have been measured. Preliminary results on the design and fabrication of the self contained capsule with primary electron source and secondary electron emitter will also be presented
ELECTRON AMPLIFICATION IN DIAMOND( )

1 edition published in 2006 in English and held by 6 WorldCat member libraries worldwide

We report on recent progress toward development of secondary emission ''amplifiers'' for photocathodes. Secondary emission gain of over 300 has been achieved in transmission mode and emission mode for a variety of diamond samples. Techniques of sample preparation, including hydrogenation to achieve negative electron affinity (NEA), have been adapted to this application
Nb-Pb Superconducting RF Gun( )

1 edition published in 2006 in English and held by 6 WorldCat member libraries worldwide

We report on the status of an electron RF-gun made of two superconductors: niobium and lead. The presented design combines the advantages of the RF performance of bulk niobium superconducting cavities and the reasonably high quantum efficiency of lead, as compared to other superconducting metals. The concept, mentioned in a previous paper, follows the attractive approach of all niobium superconducting RF-gun as it has been proposed by the BNL group. Measured values of quantum efficiency for lead at various photon energies, analysis of recombination time of photon-broken Cooper pairs for lead and niobium, and preliminary cold test results are discussed in this paper
Applied algebra, algebraic algorithms and error-correcting codes : proceedings by AAECC (Conference)( Book )

1 edition published in 1991 in English and held by 1 WorldCat member library worldwide

 
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Audience level: 0.79 (from 0.79 for ELECTRON A ... to 0.90 for Applied al ...)

Applied algebra, algebraic algorithms and error-correcting codes : proceedings
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