Call for New Proposals/Letters of Intent/Beam Requests
for Experiments or Tests using PSI's Pion, Muon and Ultracold Neutron Beams

BVR 49 - Benutzerversammlung Ring

Next Users' Meeting Ring: February 12th - 14th, 2018

Submissions and beam requests

Deadline for submissions and beam requests: January 15, 2018


Beam Time Request Form

PDF file / MSWord file

General Remarks

The pion and muon beams of PSI are normally available free of charge to user groups of universities and research laboratories. A prerequisite for the charge-free admission of external users is the readiness to publish the scientific results in internationally accepted journals, giving proper credit to PSI staff members involved in the experiments as well as proper mention of the PSI facilities.

Research groups interested in beam time must first submit research proposals which are reviewed by an international committee and recommended for approval to PSI. Proposals, as well as letters of intent or beam time requests for approved experiments and hardware tests can be submitted once a year ( address , date ).

Guidelines for submitting new proposals

The cover page of the proposal should contain the title, a list of authors with their affiliations and a summary (abstract) of the full experiment.

The second page should contain the beam and area requirements:
  • beam line, area, special facilities (separators, SC magnets, cooling water)
  • amount of required electrical power in area
  • beam properties (type of particle, intensity, momentum....)
  • duration of the experiment (time for setting up, tests, production runs)
  • any special conditions
  • beam time request for the first beam period after approval

The third page should consist of the declaration sheet for hazardous samples/equipment (PDF, Word). This does not replace a detailed description of safety questions in the full text of the proposal.

The main part of the proposal should contain the exact description of the experiment:
  • Motivation, physics and other goals. Comparison with other experiments and theory.
  • Principle of the measurement, its technique and apparatus.
  • Proposed measurements, milestones, expected performance and rates.
  • Estimate of beam time needed for each step.
  • Involvement of the contributing partners in terms of manpower (with percentageof each person), and finances.
  • Requests from PSI : manpower (workshop), finances, special equipment.

An electronic copy (preferably as a PDF file) should be sent before the deadline to

If you need beam time for the forthcoming period, please fill out and send us the beam time request form.

Upon request from PSI the collaborations of larger projects must prior to final approval write a Memorandum of Understanding where each collaborating institute must list its financial and personnel involvement in the experiment. The MoU must show that the collaboration will be able to come up with the required resources. It  must be signed by the grant holders of each collaborating institute.

Safety Regulations

Starting from 2014, new safety regulations are in operation at PSI. As a part of that, a safety training at the beginning of the beam time for each experiment has to be done by the spokesperson(s) before the experiment is allowed to be started. This is usually done together with the respective area coordinator and PSI contact person for the experiment. It includes an inspection of the area and a review of PSI safety instructions. Then the spokesperson has to fill out a safety declaration form, pass the safety training to all collaborators in the experiment, and collect their signatures in the safety declaration form. The completed form then has to be given to the PSI contact person. For further information please visit the PSI User Office Safety page.

Addenda to Proposals

If a group working on an approved experiment wants to go beyond the scientific goals of the initially proposed experiment, it can submit an addendum which will be treated like a proposal. Please follow the safety procedures. Please fill out the beam time request form, if you want beam for the coming period.

An electronic copy (preferably as a PDF file) should be sent before the deadline to

Beam time requests for approved experiments

Beam time request forms should normally be accompanied by a status report (electronic copy, preferably as a PDF File), so that the committee can review the progress of the experiment, and sent before the deadline to

Beam time requests for hardware tests

Beam time request forms for testing experimental equipment in test beams should be submitted accompanied with a short justification (electronic copy, preferably as a PDF File) before the deadline to Please follow the safety procedures .



Paul Scherrer Institute
Mrs. Anita Van Loon-Govaerts
CH-5232 Villigen PSI

Phone: +41 56 310 3254
Fax: +41 56 310 5230
Beam Time Coordinator

Paul Scherrer Institute
Dr. Stefan Ritt
CH-5232 Villigen PSI

Phone: +41 56 310 3728
Fax: +41 56 310 5230