- Email: [email protected]
A method for the preparation of deuterated polyethylene targets
NUCLEAR
INSTRUMENTS
A METHOD
FOR
AND
THE
METHODS
PREPARATION
83 (1970)
328;
0
NORTH-HOLLAND
OF DEUTERATED
PUBLISHING
POLYETHYLENE
co.
TARGETS
M. KUSUHARA Department of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro-ku,
Tokyo, Japan
Received 19 December 1969 and in final form 16 March 1970 A simple method for the preparation
of thin deuterated polyethylene fiims of optional size and thickness is described.
98% enriched deuterated polyethylene was used*. Its density is 0.88 g/cm3. A heat press of the oil pressure system was used. Two stainless steel plates of 1 mm thickness, Al foils, spacers of paper and the deuterated polyethylene are set between the two pressure plates of the equipment as shown in fig. 1. Then the deuterated polyethylene is pressed under the following conditions:
Different methods exist for making deuterated polyethylene films for target use. One method is described by Arnison’). He uses xylene as a solvent for deuterated polyethylene. However, it is difficult to make films uniformly by this method. With the method described in this note, uniform films of optional size and thickness can be made easily, although there is the thinner limit depending on the size of the foil, as specified below: The order of area 1 cm2 16 cm2
The thinner
temperature: pressure : time :
limit
After pressing, the Al foils are stripped away. Films near the thinner limit of large area incline to shrink to the center and the internal portion becomes thicker than the edge. This tendency can be suppressed when the foil is cooled in pure water at 0°C just after pressing, with Al foils adhering to it, but there remains f 10% non-uniformity. With this method, new films can be reproduced with scraps or failed ones.
0.4 mg/cm2 5.0 mg/cm’
* Delivered by the Ortec Isotope Society.
The author is grateful to Mr. T. Ishinabe for his agreement to the use of his laboratory at the Tokyo Institute of Technology.
A/“““““///
Pressureplate
Fig. 1. Deuterated
130-160” C; 2000-6000 kg/cm2 ; 2-5 min.
Reference 1) G. T. J. Arnison, Nucl. Instr. and Meth. 40 (1966) 359.
polyethylene set between two pressure plates of the press.
328
INSTRUMENTS
A METHOD
FOR
AND
THE
METHODS
PREPARATION
83 (1970)
328;
0
NORTH-HOLLAND
OF DEUTERATED
PUBLISHING
POLYETHYLENE
co.
TARGETS
M. KUSUHARA Department of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro-ku,
Tokyo, Japan
Received 19 December 1969 and in final form 16 March 1970 A simple method for the preparation
of thin deuterated polyethylene fiims of optional size and thickness is described.
98% enriched deuterated polyethylene was used*. Its density is 0.88 g/cm3. A heat press of the oil pressure system was used. Two stainless steel plates of 1 mm thickness, Al foils, spacers of paper and the deuterated polyethylene are set between the two pressure plates of the equipment as shown in fig. 1. Then the deuterated polyethylene is pressed under the following conditions:
Different methods exist for making deuterated polyethylene films for target use. One method is described by Arnison’). He uses xylene as a solvent for deuterated polyethylene. However, it is difficult to make films uniformly by this method. With the method described in this note, uniform films of optional size and thickness can be made easily, although there is the thinner limit depending on the size of the foil, as specified below: The order of area 1 cm2 16 cm2
The thinner
temperature: pressure : time :
limit
After pressing, the Al foils are stripped away. Films near the thinner limit of large area incline to shrink to the center and the internal portion becomes thicker than the edge. This tendency can be suppressed when the foil is cooled in pure water at 0°C just after pressing, with Al foils adhering to it, but there remains f 10% non-uniformity. With this method, new films can be reproduced with scraps or failed ones.
0.4 mg/cm2 5.0 mg/cm’
* Delivered by the Ortec Isotope Society.
The author is grateful to Mr. T. Ishinabe for his agreement to the use of his laboratory at the Tokyo Institute of Technology.
A/“““““///
Pressureplate
Fig. 1. Deuterated
130-160” C; 2000-6000 kg/cm2 ; 2-5 min.
Reference 1) G. T. J. Arnison, Nucl. Instr. and Meth. 40 (1966) 359.
polyethylene set between two pressure plates of the press.
328