- Titel
- Prevention of electron field emission from molybdenum substrates for photocathodes by the native oxide layer
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-390224
- Quellenangabe
- The European physical journal Erscheinungsort: Cambridge
Verlag: Cambridge University Press
Erscheinungsjahr: 2015
Jahrgang: 70
Heft: 2
Seiten: 21301-p1-21301-p8
ISSN: 1286-0042
E-ISSN: 1286-0050 - Erstveröffentlichung
- 2015
- Abstract (EN)
- Comprehensive investigations of the electron field emission (FE) properties of annealed single crystal and polycrystalline molybdenum plugs, which are used as substrates for actual alkali-based photocathodes were performed with a FE scanning microscope. Well-polished and dry-ice cleaned Mo samples with native oxide did not show parasitic FE up to a field level of 50 MV/m required for photoinjector cavities. In situ heat treatments (HT) above 400°C, which are usual before photocathode deposition, activated field emission at lower field strength. Oxygen loading into the Mo surface, however, partially weakened these emitters. X-ray photoelectron spectroscopy of comparable Mo samples showed the dissolution of the native oxide during such heat treatments. These results reveal the suppression of field emission by native Mo oxides. Possible improvements for the photocathode preparation will be discussed.
- Andere Ausgabe
- Link zum Artikel der zuerst in der Zeitschrift 'The European physical journal - Applied physics' erschienen ist
DOI: 10.1051/epjap/2015150167 - Freie Schlagwörter (DE)
- Feldemissions-Rastermikroskop (FESM), Röntgen-Photoelektronenspektroskopie (XPS), Photokathodenvorbereitung
- Freie Schlagwörter (EN)
- Field emission scanning microscope (FESM), X-ray photoelectron spectroscopy (XPS), Photocathode preparation
- Klassifikation (DDC)
- 530
- Verlag
- Cambridge University Press, Cambridge
- Förder- / Projektangaben
- German Federal Ministry of Education and Research ID: 05K13PX2
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-390224
- Veröffentlichungsdatum Qucosa
- 02.09.2020
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
