Device for x-ray analysis

Claim 1

An apparatus for X-ray analysis comprising: a. a crystal monochromator for diffracting X-rays radiated from a sample, b. an X-ray counter for converting the diffracted X-rays into pulses whose height corresponds to the wavelengths of the Xrays entering said counter, c. means for rotating said crystal monochromator and said X-ray counter on a common axis, the rotation speed of said crystal monochromator being one-half the speed of said X-ray counter, d. means for controlling the pulse height of said pulses produced by said X-ray counter, the mean pulse height of the pulses attributable to the X-rays satisfying the Bragg equation being maintained constant, and e. a pulse height analyzer for analyzing the controlled pulses, in which the base line and window width are varied such that said window width is in proportion to square root sin theta , theta being the incident angle of the X-rays with respect to said crystal monochromator.

Claim 2

An apparatus for X-ray analysis comprising: a. a crystal monochromator for diffracting X-rays radiated from a sample, b. an X-ray counter for converting the diffracted X-rays into pulses whose height corresponds to the wavelengths of the Xrays entering said counter, c. means for rotating said crystal monochromator and said X-ray counter on a common axis, the rotation speed of said crystal monochromator being one-half the speed of said X-ray counter, d. means for controlling the pulse height of said pulses produced by said X-ray counter, the mean pulse height of the pulses attributable to the X-rays satisfying the Bragg equation being maintained constant, and e. a pulse height analyzer for analyzing the controlled pulses, in which the base line and window width are varied such that said window width is in proportion to square root sin theta , theta being the incident angle of the X-rays with respect to said crystal monochromator.

Claim 6

An apparatus for X-ray analysis comprising: a. a crystal monochromator for diffracting X-rays radiated from a sample, b. an X-ray counter for converting the diffracted X-rays into pulses whose height corresponds to the wavelengths of the X-rays entering said counter, c. means for rotating said crystal monochromator and said X-ray counter on a common axis, the rotation speed of said crystal monochromator being one-half the speed of said X-ray counter, d. means for controlling the pulse height of said pulses produced by said X-ray counter to be proportional to cosecant theta , theta being the incident angle of the X-rays with respect to crystal monochromator, the said mean pulse height of the pulses corresponding to the X-rays satisfying the Bragg equation thereby being maintained substantially constant; and e. a pulse height analyzer for analyzing the pulses comprising two discriminators and an exclusive OR circuit connected to said discriminators, said first discriminator passing pulses whose pulse height exceeds A minus KA Square Root sin theta and the said second discriminator passing pulses whose pulse height exceeds 2KA Square Root sin theta above the minimum pulse height passed by the first discriminator where A and K are constants.

Claim 7

An apparatus for X-ray analysis comprising: a. a crystal monochromator for diffracting X-rays radiated from a sample, b. an X-ray counter for converting the diffracted X-rays into pulses whose height corresponds to the wavelengths of the X-rays entering said counter, c. means for rotating said crystal monochromator and said X-ray counter on a common axis, the rotation speed of said crystal monochromator being one-half the speed of said X-ray counter, d. means for controlling the pulse height of said pulses produced by said X-ray counter to be proportional to cosecant theta , theta being the incident angle of the X-rays with respect to crystal monochromator, the said mean pulse height of the pulses corresponding to the X-rays satisfying the Bragg equation thereby being maintained substantially constant; and e. a pulse height analyzer for analyzing the pulses comprising two discriminators and an exclusive OR circuit connected to said discriminators, said first discriminator passing pulses whose pulse height exceeds A minus KA Square Root sin theta and the said second discriminator passing pulses whose pulse height exceeds 2KA Square Root sin theta above the minimum pulse height passed by the first discriminator where A and K are constants.