Hydrogen ion-driven permeation in carbonaceous films

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6781679

Anderl, R A; Holland, D F; Longhurst, G R

This paper presents the results of investigations into the permeation properties of amorphous carbonaceous, a-C:H, films produced by plasmachemical deposition techniques. Carbonaceous films on iron substrates with thickness ranging from 60 nm to 110 nm were subjected to high fluence implantations with mass analyzed D3 ions with energies ranging from 600 eV to 3000 eV and fluxes ranging from 5 /times/ 10 U D/cmS-s to 5 /times/ 10 V D/cmS-s, respectively. Deuterium re-emission upstream, deuterium permeation downstream and secondary ions sputtered from the implantation surface were measured as a function of implantation fluence for specimens at 420 K. The present studies that the a-C:H film permeability is directly related to the time, hence the fluence, required to achieve isotopic replacement and saturation of the deuterium ion beam atoms stopped in the implant region. Once the deuterium saturation level is achieved in the layer, a significant fraction of the implanting ions can result in permeation. For the present experiment, this permeation factor was much higher than that for uncoated iron specimens subjected to similar beam conditions. Carbon sputter yields of 0.008-0.01 C/D were determined in this work for 1000-eV to 400-eV deuterium ions incident on a-C:H films. 33 refs., 3 figs.

• Research Organization: EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6781679
• Report Number(s): EGG-M-40087; CONF-880512-18; ON: DE89005271
• Country of Publication: United States
• Language: English

Related Subjects

656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACCELERATOR FACILITIES
AMORPHOUS STATE
CARBONACEOUS MATERIALS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CLOSED PLASMA DEVICES
DEPOSITION
DEUTERIUM
FILMS
FIRST WALL
HYDROGEN ISOTOPES
ION IMPLANTATION
ISOTOPES
LIGHT NUCLEI
MATERIALS
NUCLEI
ODD-ODD NUCLEI
STABLE ISOTOPES
SURFACE COATING
TARGET CHAMBERS
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTOR WALLS
THIN FILMS
TOKAMAK DEVICES