A Field Ionization Position Sensitive Detector for Neutral Molecular Beams

Projektinformationen

ID Finanzhilfevereinbarung: INTAS2004-78-7183

Startdatum 1 Mai 2005

Enddatum 30 April 2007

Finanziert unter

• International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Gesamtkosten € 0,00

EU-Beitrag € 68 500,00

Koordiniert durch

Otto-von-Guericke University of Magdeburg
Germany

Ziel

The aim of this project is to develop the first position sensitive detector for neutral molecular beams based on the principle of field ionization. The idea is to provide the molecular beam R&D community with a device which will be a direct analogy to the channel plates used for electron and ion beams. The basic idea is simple: In the position sensitive detector the incident atomic (or molecular) beam is field ionized by an 2D-array of carbon nanotubes. The extremely high curvature of the apex of each nano-sized carbon tube allows obtaining the field strengths necessary for the field ionization (few Volt per Angstrom) by applying the moderate high voltages (few kV). The ionization current measured at each “pixel” will provide directly a spatially resolved image of the incident beam, and thus that of the object if applied in an Atom Microscope. In addition to spatial resolution, the overall sensitivity of this detector should also be significantly greater than that of a standard electron bombardment detector typically used in molecular beam experiments where the ionization probability can be as low as 10-6 (Helium). The final aim is to produce a “proof of principle” position sensitive detector consisting of a large scale patterned array of 4 square pixels each about 250 micron x 250 micron and with a spacing of around 50 micron and to apply it as a detector in the functioning scanning Helium Atom Microscope. When these first experiments have proven successful in terms of stability and sensitivity, it should be easy to develop the higher resolution devices (smaller pixels down to a few microns), which can be designed in accordance with application requirements. One expects from the proposed research a break through from the scanning (i.e. quasi one-dimensional) to the truly 2D-detection of the neutral atomic and molecular beams.

Programm/Programme

• IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Thema/Themen

• Position Sensitive Detect 2004 - Thematic Call - Position Sensitive Detectors

Aufforderung zur Vorschlagseinreichung

Data not available

Finanzierungsplan

Data not available

Koordinator

Otto-von-Guericke University of Magdeburg

• EU-Beitrag: Keine Daten
• Adresse: Universitatsplatz 2 ; 39106 Magdeburg ; Deutschland
• Gesamtkosten: Keine Daten

Beteiligte (3)

Graz University of Technology

Österreich

• EU-Beitrag: Keine Daten
• Adresse: Petersgasse 16 ; 8010 Graz
• Gesamtkosten: Keine Daten

LVIV POLYTECHNIC NATIONAL UNIVERSITY

Ukraine

• EU-Beitrag: Keine Daten
• Adresse: BANDERA STR., 12 ; LVIV
• Gesamtkosten: Keine Daten

Moscow Institute of Physics and Technology

Russland

• EU-Beitrag: Keine Daten
• Adresse: Institutskij Per. 9 ; 141700 Dolgoprudnyj, Moscow district
• Gesamtkosten: Keine Daten