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ASTM E803-91(2008)

Заменен
Standard Test Method for Determining the <span class="italic">L/D </span>Ratio of Neutron Radiography Beams — 7 стр.
Значение и использование

The quality of a neutron radiographic image is dependent upon many factors. The L/D ratio is one of those factors and constitutes a numerical definition of the geometry of the neutron beam. The L/D ratio required for a specific neutron radiographic examination is dependent upon the thickness of the specimen and the physical characteristics of the particular element of interest. Use of this test method allows the radiographer and the user to determine and periodically check the effective collimation ratio.

Область применения

1.1 This test method defines an empirical technique for the measurement of the effective collimation ratio, L/D, of neutron radiography beams. The technique is based upon analysis of a neutron radiographic image and is independent of measurements and calculations based on physical dimensions of the collimator system. The values derived by this technique should be more accurate than those based on physical measurements, particularly for poorly defined apertures.

ICS
19.100 Non-destructive. Including testing equipment: industrial apparatus for X-ray and gamma radiography, penetrant flaw detectors, etc. / Неразрушающие испытания. Включая испытательное оборудование: промышленная аппаратура для рентгеновской и гамма-радиографии, проникающие дефектоскопы и т.д.
Сборник ASTM
03.03 Nondestructive Testing (I): C1331 – E2373 / Неразрушающий контроль (I): C1331 – E2373
Тематика
Nondestructive Testing