Methods and apparatus for the control and analysis of X-rays

Details Methods and apparatus for the control and analysis of X-rays Methods and apparatus for the control and analysis of X-rays

1975-07-09

1976-11-09

Church, Craig E.

Radiant energy

Coded record and readers; invisible radiant energy type

250273, 250505, 250514, G01N 2320

Patent

active

039913090

ABSTRACT:
Fast X-ray excitation processes such as occur during nuclear fusion reactions where high energy laser pulses hit a target, as for the purpose of stimulating atomic emission, may be analyzed by interposing a crystal in the path of the X-rays. The X-rays are transmitted through this crystal by means of the anomalous transmission or Bormann effect. A periodic strain field is established in the crystal to enable or inhibit anomalous transmission. The transmitted radiation is received by a measurement system which is operated in synchronism with the strain field. A solid state shuttering mechanism is obtained which rapidly interrupts the X-rays so that they can be measured even when produced by fast X-ray excitation processes. Various methods and apparatus for producing the periodic strain field are described, particularly electrostrictive techniques, piezoelectric techniques using separate transducers mounted on the crystal or the piezoelectric properties of the crystal itself and techniques for stimulating acoustic vibration by means of an optical beam.

REFERENCES:
patent: 3376415 (1968-04-01), Krogstad
patent: 3381127 (1968-04-01), Spielberg
patent: 3591803 (1971-07-01), Spielberg
patent: 3769507 (1973-10-01), Kenney

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