What is ActiWiz?

Operating an accelerator one always faces beam losses which result in the activation of adjacent material. On closer inspection it becomes evident that the radiological hazard exhibited by radioactive material has a clear logistical, operational as well as potentially significant financial impact on any further operation or process that is to be conducted involving activated constituents or infrastructure of an accelerator. In order to assess and compare the radiological hazards of arbitrary materials to be used at CERN’s accelerators a mathematical model and an associated computer code with a graphical interactive user interface - ActiWiz - has been developed which allows for fast and relatively simple analysis.


The software (download)

ActiWiz provides a graphical user interface to define arbitrary materials and yields an assessment of the radiological hazard taking operational RP as well as waste disposal considerations into account. It is based on isotope predictions obtained from FLUKA Monte Carlo calculations. The minimum required parameters to be selected by the user are:

  •  the accelerator (LHC, SPS, PS, etc...) or LHC experiment (ALICE, ATLAS, CMS, LHCb)
  •  a prototype location (close to the beam line, next to tunnel wall, etc...)

If more detailed information like the equipment lifetime is available it can be taken into account as well to obtain comparisons for various materials.

ActiWiz, in its present state, has been tailored to CERN specific applications and MUST NOT be used at other facilities, unless explicit authorization has been granted.

The software can be downloaded from here.

Reference: Helmut Vincke, Christian Theis, “ActiWiz – optimizing your nuclide inventory at proton accelerators with a computer code”, Proceedings of the ICRS12 conference, 2012, Nara, Japan, Progress in Nuclear Science and Technology, Volume 4 pp. 228-232, (2014).


The catalogue (interactive web-version)

In order to provide guidelines for the selection of material a collection of the most commonly used materials at CERN has been compiled and processed with ActiWiz by a working group to assess the respective radiological hazard. It is available as an interactive web version. Please note that the previously available print version on EDMS is obsolete and should not be used anymore as it is still based on ActiWiz 2.

In case of questions/problems please contact the authors of the software: Christian Theis or Helmut Vincke
© CERN 2011. All rights not expressly granted reserved.