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The ILL is dedicated to helping its visiting researchers to make the most of its facilities. Neutron beams and instrument access are provided free of charge for proposers of accepted experiments.

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User guide

User Club

The ILL User Club provides online access to all the information and administrative tools for our scientific visitors, presented in a user friendly environment.


Visitors are asked to make their own travel arrangements.

Users eligible for reimbursement must consult the following information before travel. The ILL reimburses return travel costs between the home laboratory and the ILL using the most economical means of transport authorised by the ILL. Please book return tickets when possible (including shuttle tickets) and use reductions if available.

All exceptions to the regulations must be agreed with the User Office before your trip: contact user-office(at)

  • Train: 2nd class fare
  • Air: economy flight (if your flight costs more than the average price range for your period of travel, please contact user-office(at)

  • Car

    • Standard travel: on the basis of km travelled at a rate of 0.18 EUR/km. Prior authorisation is not required.
    • Transport of heavy, bulky or fragile equipment, which cannot be carried by public transport: kms are reimbursed at a higher rate of 0.32 EUR/km. Prior authorisation is required.
    • Fuel, motorway tolls, parking, tunnel fees or car hire are not reimbursed.
    • If you don’t take the shortest route, please provide details of your car journey (ie detours to pick up passengers, etc.)
    • In all cases please mention on the Reimbursement Claim the names of the other Users entitled to reimbursement who travelled together in the same car.

  • Unauthorised costs (taxi, car parking fees, 1st class tickets)

    • Please inform the User Office in advance of your journey if you intend to take a taxi where public transport is unavailable.
    • All non-authorised transportation costs will not be reimbursed unless agreed with the User Office before travel.

  •  Extra days or travel detours: All non-standard travel options (such as adding extra days to your trip or deviations from the normal itinerary, both for personal and professional reasons) should be prearranged with the User Office and justified by presenting a price comparison. If this non-standard option is more expensive, we will reimburse a standard economy return fare.

You may also consult our general policy for travel and reimbursement, which is applicable to all ILL visitors (not only Users).