Study of thermionic emission for its role in ionization of resonantly pumped Ca vapour

E. E. Khawaja; M. A. Khan; H. A. Al-Juwair

doi:10.1080/00207219108925541

Study of thermionic emission for its role in ionization of resonantly pumped Ca vapour

E. E. Khawaja
, M. A. Khan
, H. A. Al-Juwair

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We have recently reported the ionization of calcium atoms through resonant laser pumping of ³P metastable states. There, it was concluded that the rapid avalanche of ionization is mainly carried through by superelastically heated electrons. It was suggested that the ‘seed’ electrons may be provided by thermionic emission. In order to confirm this we have now investigated the nature of thermionic emission in our experiment. Besides confirming this, it was found that the emission was from calcium metal and other metallic surface coated with layers of calcium.

Original language	English
Pages (from-to)	991-996
Number of pages	6
Journal	International Journal of Electronics
Volume	71
Issue number	6
DOIs	https://doi.org/10.1080/00207219108925541
State	Published - Dec 1991

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1080/00207219108925541

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title = "Study of thermionic emission for its role in ionization of resonantly pumped Ca vapour",

abstract = "We have recently reported the ionization of calcium atoms through resonant laser pumping of 3P metastable states. There, it was concluded that the rapid avalanche of ionization is mainly carried through by superelastically heated electrons. It was suggested that the {\textquoteleft}seed{\textquoteright} electrons may be provided by thermionic emission. In order to confirm this we have now investigated the nature of thermionic emission in our experiment. Besides confirming this, it was found that the emission was from calcium metal and other metallic surface coated with layers of calcium.",

author = "Khawaja, \{E. E.\} and Khan, \{M. A.\} and Al-Juwair, \{H. A.\}",

year = "1991",

month = dec,

doi = "10.1080/00207219108925541",

language = "English",

volume = "71",

pages = "991--996",

journal = "International Journal of Electronics",

issn = "0020-7217",

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T1 - Study of thermionic emission for its role in ionization of resonantly pumped Ca vapour

AU - Khawaja, E. E.

AU - Khan, M. A.

AU - Al-Juwair, H. A.

PY - 1991/12

Y1 - 1991/12

N2 - We have recently reported the ionization of calcium atoms through resonant laser pumping of 3P metastable states. There, it was concluded that the rapid avalanche of ionization is mainly carried through by superelastically heated electrons. It was suggested that the ‘seed’ electrons may be provided by thermionic emission. In order to confirm this we have now investigated the nature of thermionic emission in our experiment. Besides confirming this, it was found that the emission was from calcium metal and other metallic surface coated with layers of calcium.

AB - We have recently reported the ionization of calcium atoms through resonant laser pumping of 3P metastable states. There, it was concluded that the rapid avalanche of ionization is mainly carried through by superelastically heated electrons. It was suggested that the ‘seed’ electrons may be provided by thermionic emission. In order to confirm this we have now investigated the nature of thermionic emission in our experiment. Besides confirming this, it was found that the emission was from calcium metal and other metallic surface coated with layers of calcium.

UR - https://www.scopus.com/pages/publications/0026367909

U2 - 10.1080/00207219108925541

DO - 10.1080/00207219108925541

M3 - Article

AN - SCOPUS:0026367909

SN - 0020-7217

VL - 71

SP - 991

EP - 996

JO - International Journal of Electronics

JF - International Journal of Electronics

IS - 6

ER -

Study of thermionic emission for its role in ionization of resonantly pumped Ca vapour

Abstract

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