Accession Number:

ADA224948

Title:

Direct Injection Supersonic Cluster Beam Source for FT-ICR Studies of Clusters

Descriptive Note:

Interim technical rept.

Corporate Author:

RICE UNIV HOUSTON TX DEPT OF CHEMISTRY

Personal Author(s):

• Maruyame, Shigeo
• Anderson, Lila R.
• Smalley, Richard E.

Report Date:

1990-07-23

Pagination or Media Count:

23.0

Abstract:

A miniaturized pulsed supersonic beam source has been developed using laser vaporization of a computer-controlled target disc, producing intense beams of cluster ions with excellent repeatability and control. Due to its small size and narrow pulse width, the entire source is adequately pumped by a single 170 1s turbopump. The resultant vacuum quality permits this source to be attached to a fourier transform ion cyclotron resonance apparatus FT-ICR such that the supersonic cluster ion beam is directly injected. The result is a powerful but simple FT-ICR instrument of wide applicability. The new source is suited as well for a variety of other uses such as molecular beam epitaxy. Keywords Direct injection Supersonic cluster beam source.

Descriptors:

• *ION BEAMS
• VAPORIZATION
• CONTROL
• IONS
• SOURCES
• INJECTION
• VACUUM
• EPITAXIAL GROWTH
• MOLECULAR BEAMS
• CLUSTERING
• QUALITY
• WIDTH
• DISKS
• FOURIER TRANSFORMATION
• LASER PUMPING

Subject Categories:

• Physical Chemistry
• Radiation and Nuclear Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE