MetalJet D2+ 160 kV

The world's brightest home-lab X-ray source

The MetalJet D2+ features Excillum’s unique metal-jet anode technology and advanced electron optics. Achieving significantly higher brightness and smaller spot sizes than any other available microfocus X-ray source, the MetalJet can create very brilliant and small beams enabling the closest possible performance to synchrotron capabilities in the home lab.

Within the 5-30 μm spot-size range, the Excillum MetalJet D2+ delivers significantly higher brightness than any other available microfocus X-ray source on the market, with an excellent spot quality. This makes it an ideal source for any microfocus application requiring shorter exposure times, higher throughput or better signal to noise.

The 160 kV version of the D2+ allows for a higher acceleration voltage and thus a harder X-ray spectrum. The higher X-ray yield at higher energies will benefit anyone interested in the indium emission line at 24 keV or the bremstrahlung above 20 keV.

With the introduction of Dynamic Adaptation technology the practical cathode lifetime has been further extended 2-4x, up to a full year of 24/7 operation depending on application.

Features and benefits

  • Extreme microfocus source power
  • Optional shutter
  • Superior spot quality
  • Optional dual-port mode
  • Minimal maintenance
  • User variable size and aspect ratio of spot
  • LaB6 long-life cathode
  • Very stable X-ray emission and spot position
  • User-friendly Graphical User Interface
  • Controlled through GUI or TCP/IP protocol
  • Adjustable take-off angle
  • No external cooling water requirement
  • Operated remotely from any computer

Technical specifications

Target material1

Liquid metal alloy

Min. focal spot size

~10 µm (~5 µm offered on request)

Target type

Liquid jet

Emission stability3

< 1%


21-160 kV

Position stability3

< 1 μm


0-250 W

Min. focus-object distance4


Max current

4.3 mA

Beam angle5


1) The room temperature liquid metal alloys supplied for the MetalJet source consist mainly of gallium, indium and tin. They have low reactivity and low toxicity but should be handled according to their safety data sheets and local regulations.
2) The actual power used is dependent on spot-size and voltage. However, maximum output power of the 160 kV high-voltage-generators is 640 W.
3) Standard deviation
4) Without a shutter (24.8 mm with shutter).
5) Without a shutter (10.5° mm with shutter).

Available target alloys

Target alloy

[weight %]

[weight %]

[weight %]

















6) Operation of ExAlloy-I2 requires that the MetalJet source is equipped with a heater system since the melting point is above room temperature. Due to this requirement the MetalJet sources with ExAlloy-I2 are under limited availability. Please contact us for further information.


Spot stability over 24 h
Spot shape example
Emission Spectra at 250 W, 70 kV, 20 µm (0.1 keV bin width)

The source consists of the head and the pump system with dimensions shown in the drawing. The head has to be mounted essentially straight above the pump system. The coupling is semi-rigid, allowing some movement of the source head.

In addition, the MetalJet D2+ 70 kV consists of two 4U (176 mm height) 19” rack electronics boxes and a floor standing air/water chiller (69×36×62 cm), that can be mounted up to 4m from the head and pump system.

Sources operating with ExAlloy I2 furthermore have heater jackets around parts in the alloy recirculation loop as well as an additional 3U (133 mm height), 19” rack mounted controller.

The source can be remotely operated through TCP/IP or directly through the GUI. The GUI can be operated on the source itself if it is equipped with monitor, keyboard and mouse, or on most computer platforms with a TCP/ IP connection to the source.

The source cannot be operated as a standalone unit and must be integrated into a system providing the proper interlock connections.

Mains: AC, single phase, 200-240 V, 16 A, 50/60 Hz.

Ambient: 20-25°C (stable within ± 0.2°C for optimal source stability), max 85% relative humidity.

160 kV performance examples

Jet material
Nominal X-ray spot size7[µm]
E-beam power [W]
Ga Kα (9.2 keV) peak brightness
[photons/(s mm2 mrad2)]
Ga Kα (9.2 keV) radiant flux
[photons/(s mrad2)]
In Kα (24 keV) peak brightness
[photons/(s mm2 mrad2)]
In Kα (24 keV) radiant flux
[photons/(s mrad2)]









7) Actual e-beam spot is 35×9 μm line focus, but the apparent X-ray spot is essentially circular.


MetalJet D2+ 160kV


MetalJet Technology

Safety and compliance

Excillum x-ray sources

More information

The metal-jet technology
Scientific publications (with MetalJet)

Related products

MetalJet E1+ 160 kV
MetalJet D2+ 70 kV
MetalJet C2
MetalJet with optics



Questions about our products?
Speak to our experts

We have a growing organization and a network of partners with the capabilities and expertise to maximize the benefits of our technology in your application.

Ask an expert
Excillum Julius Hållstedt image

Julius Hållstedt, Ph.D.

Business Development, Analytical

Some application areas for MetalJet D2+ 160kV


Scattering and diffraction

Spectroscopy and fluorescence

Customer support

Our MetalJet and NanoTube X-ray sources are designed to ensure the highest levels of performance and reliability. Whenever regular maintenance, troubleshooting or optimization are required, our team of highly experienced engineers is available to provide on-site or remote support in every market where our technologies are installed.

Get support