Photoemission studies on niobium for superconducting photoinjectors

被引：20

作者：

Smedley, J ^{[1
]}

Rao, T ^{[1
]}

Zhao, Q ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2005年 / 98卷 / 04期

关键词：

Cathodes - Mathematical models - Niobium - Quantum efficiency - Quantum theory - Superconducting materials;

D O I：

10.1063/1.2008389

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This work presents an investigation of the photoemission properties of niobium. The quantum efficiency (QE) of niobium cathodes was measured for a variety of surface preparations relevant to the operation of a superconducting injector. The dependence of the QE on wavelength, applied field, and laser cleaning energy was determined. The three-step model of photoemission was adapted to fit the observed emission behavior. QE values of 6.5x10(-5) for 266 nm, 1.0x10(-4) for 248 nm, and 2.8x10(-4) for 193 nm were observed with a bias field of 1 MV/m. (c) 2005 American Institute of Physics.

引用

页数：6

共 13 条

[1] The analysis of photoelectric sensitivity curves for clean metals at various temperatures [J].

Fowler, RH .

PHYSICAL REVIEW, 1931, 38 (01) :45-56

[2] Photoelectric quantum efficiency of niobium for lambda=193 nm and lambda=248 nm [J].

Hand, LN ;

Happek, U .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 372 (03) :335-338

[3]

Kneisel P., 1980, P 1 WORK RF SUP KARL, P27

[4] The effect of intense electric fields on the photoelectric properties of metals [J].

Lawrence, EO ;

Linford, LB .

PHYSICAL REVIEW, 1930, 36 (03) :0482-0497

[5]

Ley L., 1979, PHOTOEMISSION SOLIDS

[6] WORK FUNCTION OF ELEMENTS AND ITS PERIODICITY [J].

MICHAELSON, HB .

JOURNAL OF APPLIED PHYSICS, 1977, 48 (11) :4729-4733

[7]

NASSISI V, 2000, P 7 EUR PART ACC C E

[8] DENSITY OF STATES OF NB AND MO USING SLATER-KOSTER INTERPOLATION [J].

PICKETT, WE ;

ALLEN, PB .

PHYSICS LETTERS A, 1974, A 48 (02) :91-92

[9]

SMEDLEY J, 2001, THESIS SUNY STONYBRO

[10] Design, construction and status of all niobium superconducting photoinjector at BNL [J].

Srinivasan-Rao, T ;

Ben-Zvi, I ;

Burrill, A ;

Citver, G ;

Hershcovitch, A ;

Pate, D ;

Reuter, A ;

Scaduto, J ;

Zhao, Q ;

Zhao, Y ;

Delayen, J ;

Kneisel, P ;

Bluem, H ;

Cole, M ;

Favale, A ;

Rathke, J ;

Schultheiss, T .

PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5, 2003, :92-94

← 1 2 →