A Caltech Library Service

Ion Beam Damage in CaF_2

Wie, C. R. and Vreeland, T., Jr. and Tombrello, T. A. (1984) Ion Beam Damage in CaF_2. Brown Bag Preprint Series in Basic and Applied Science, 20. California Institute of Technology , Pasadena, CA. (Unpublished)

[img] PDF - Accepted Version
See Usage Policy.


Use this Persistent URL to link to this item:


The change in lattice parameter and the induced damage are studied in single crystal CaF_2 bombarded by a 15 MeV Cl ion beam. The lattice parameter change (strain) and the damage for increasing ion beam dose (5 x 10^(12) /cm^2 to 7 x 10^(15)/cm^2) is observed via x-ray rocking curve analysis using a double-crystal diffractometer and x-ray reflection topography. The ion beam energy (range = ~ 4.5 µm in CaF_2) is such that both the electronic region and the nuclear cascade region of energy loss show up in the diffraction signal. By kinematical x-ray diffraction theory analysis, the progress of strain/damage depth profile with increasing beam dose is shown explicitly. The increase in strain is nonlinear with beam dose for the dose range studied. For increasing beam dose, the strain level in the electronic energy loss region is fixed, while that in the nuclear collision loss region increases effectively until that region becomes completely amorphous.

Item Type:Report or Paper (Technical Report)
Alternate Title:Ion Beam Damage in CaF2
Additional Information:One of the authors (C. R. Wie) would like to thank V. S. Speriosu for help in the lab when he first started this project. This work was supported in part by the NSF (DMR83-18274).
Funding AgencyGrant Number
Series Name:Brown Bag Preprint Series in Basic and Applied Science
Issue or Number:20
Record Number:CaltechAUTHORS:20150223-141839563
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55111
Deposited By: Tony Diaz
Deposited On:23 Feb 2015 22:55
Last Modified:03 Oct 2019 08:03

Repository Staff Only: item control page