METALJET D2+
Revision 19, November 2016
Page 1-2
1.3
Product information
1.3.1
Product identification
To correctly identify the product when communicating with Excillum, always provide the following information
from the identification tag(s):
Model number
Article number
Serial number
Manufacturing year
Anode alloy
The identification tag on each of the four sub-assembly units (see table below) is located on its backside, close
to the electrical power connector.
The article number of this MetalJet D2+ source is G-020-0037. The x-ray source consists of the following four
sub-assembly units.
Sub-assembly unit
Article number
Electron gun/x-ray head
G-020-0020
Pump box
G-035-0033
X-ray system controller
G-010-0000
X-ray high-voltage controller
G-010-0001
1.3.2
Design and function
The MetalJet D2+ x-ray source is based on a metal-jet anode. It is not a stand-alone x-ray source, but a
component in a complete x-ray system (for more information, see Section 2.1).
Basically, the MetalJet D2+ source consists of a recirculating metal-jet loop and an electron gun, as well as
electronics modules for operation control. The electron gun generates an electron beam, which strikes the
metal jet and produces x-rays. This x-ray source is suitable for use in any x-ray application where increased x-
ray source brightness is desired. Increased source brightness can be used in order to decease the exposure
time or increase the resolution of the x-ray image.
1.3.2.1
Liquid-metal circulation loop
The jet pump displaces liquid metal from the reservoir in the low-pressure flex-hose assembly to the high-
pressure side. The pressure in the high-pressure tubing is stabilized by a pulsation dampener. When the liquid
metal reaches the nozzle assembly, a metal jet is ejected. This metal jet is the target for the electron beam
generated in the electron gun. After interaction with the electron beam, the metal jet ends up in the reservoir
in the low-pressure flex-hose assembly, and a closed circulation loop is completed.
1.3.2.2
Electron gun/x-ray head
A potential difference between the cathode and the plate with the anode hole generates an electric field. The
cathode is heated in order to emit electrons into the electric field. When free electrons enter the electric field
they are accelerated towards the plate with the anode hole. The electron beam passes through the anode hole
into the flight tube. The electron optics and the focusing lens manipulate the electron beam in order to focus it
onto the metal jet. When the electron beam strikes the metal jet x-rays are produced and emitted through the
x-ray window.