Cool, that's a beast compared to mine. Max is 0.1 mA (100 microamp) here.

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It does have its own shielded housing, and I suspect the narrow measured beam cone angle is controlled by an mechanical iris inside the sealed tube. I'm assuming yours is also a side exit not and end-fire, those use transmission targets, the kind I use have "reflection" tungsten targets.? The excitation HV is less than the W Ka, so all I work with are Bremsstrahlung X-Rays, thus the external filtering etc.

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Geo

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----- Original Message -----
From: Dude <dfemer@...>
To: [email protected]
Sent: Sun, 09 Feb 2020 15:30:33 -0500 (EST)
Subject: Re: [XRF] Li battery shiny vs dull

?

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Geo,

My Kevex’s are PXS4-613W and ?run with a CU015 60 kV power supply.

Target Voltage:? 5.0 to 60.0 kV

Current:? 0.01 to 1.00 mA

X-ray source spot size: 0.01” x 0.020” (0.25mm x 0.45 mm)
Approximately

X-ray Output: 101R/min at 60 watts

X-ray Window: 0.005” (0.13mm) Be

Angle of illumination: 35 degrees inclusive (Approx)

?

When you first fire it up or when it’s been sitting for a long
while ramp up the voltage in 20% steps at 10 % of max current steps ?to allow
the tube to outgas. Do this over a 10- to 15 min period (1 minute minimum at
each step) before going to full power. Watch out for arcing. ?Don’t run
prolonged operation at 5kV or less at high beam current as that will run the filament
hotter than normal and will decrease the filament life.

They warn that the X-rays are dangerous and ?may be fatal. The
X-ray tube window must be placed in a shielded chamber. It’s also clearly stated
not to let anyone named Geo operate this machinery.

Dud

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?

Geo,

I have the specs here someplace but I don’t remember exactly. 16
seems about right and the microfocus spot was very small as I remember.

I’ll dig around and see f I can find the manual

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