A fresh look at thermal field emission from tungsten tip

Ahmed Abdurrahman Ahmed AL-TABBAKH

Makale detayları

A fresh look at thermal field emission from tungsten tip

Yazarlar:

Ahmed Abdurrahman Ahmed AL-TABBAKH

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.271-278

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000760441

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Anahtar kelimeler:

Özet:

 

Electron emission from clean tungsten tips has been  investigated at different temperatures and applied electric field.  Emission mechanism is analyzed on the basis of the Fowler-Nordheim  (FN) model and a parameter extraction model based on elimination of  field enhancement factor.  The suggested extraction model of the  physical and geometrical parameters is found fairly adequate to  resolving the apparently confusing behavior of these parameters and  shedding light on the emission mechanism.  The observed linear FN  plots at low temperatures confirm the predominating effect of the  applied field on the electron emission.  At elevated temperatures,  emission is found to fall in the intermediate region between field  emission and thermionic emission, therefore known as thermal-field  emission.

 

Electron emission from clean tungsten tips has been  investigated at different temperatures and applied electric field.  Emission mechanism is analyzed on the basis of the Fowler-Nordheim  (FN) model and a parameter extraction model based on elimination of  field enhancement factor.  The suggested extraction model of the  physical and geometrical parameters is found fairly adequate to  resolving the apparently confusing behavior of these parameters and  shedding light on the emission mechanism.  The observed linear FN  plots at low temperatures confirm the predominating effect of the  applied field on the electron emission.  At elevated temperatures,  emission is found to fall in the intermediate region between field  emission and thermionic emission, therefore known as thermal-field  emission.

Makale detayları

A fresh look at thermal field emission from tungsten tip

Yazarlar:

Ahmed Abdurrahman Ahmed AL-TABBAKH

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.271-278

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000760441

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Field electron emission

Fowler-Nordheim theory

parameter extraction model

Sayı

Makale detayları

A fresh look at thermal field emission from tungsten tip

Yazarlar: Ahmed Abdurrahman Ahmed AL-TABBAKH

Yayıncı: TUBITAK

Dergi: Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.271-278

Belge Tipi: Makale

Yayın Tarihi: 1/2012

Belge Dili: Türkçe

Document ID (Org No.): 2000760441

Sıklık: İki Aylık

eISSN: 1303-6122

pISSN: 1300-0101

Field electron emission

Fowler-Nordheim theory

parameter extraction model

Sayı

Yazarlar:

Ahmed Abdurrahman Ahmed AL-TABBAKH

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.271-278

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000760441

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101