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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.


  • Requests for accommodation are made by ticking the appropriate box on the registration form in the User Club. Users are accommodated in the Guest House, depending on availability of rooms in the ILL quota. No accompanying person can be accommodated in the Guest House. If the Guest House is full (ie over ILL quota), the Travel Office will book a room in an aparthotel/hotel near the station and the bill (incl. breakfast and tourist tax) will be paid directly by ILL.

  • If you arrange accommodation yourself or request specific accommodation to be booked by ILL, you will be reimbursed on the basis of Guest House cost to ILL (20 EUR/night). You will be asked to pay for your accommodation and you will be reimbursed 20 EUR/night on submission of the receipt.
  • Bookings are made only for users and not for any accompanying person. Once the booking is confirmed, if you are accompanied you should contact the hotel directly to ensure the room is suitable for your requirements (most rooms already have twin or double beds). You should pay any supplementary costs directly to the hotel.
  • If you wish to modify or cancel your accommodation reservation please inform the Travel Office immediately. If you arrive later or leave earlier without letting us know and the cost of the unused accommodation is invoiced to ILL, this cost (as well as any extra charges arising through failure to inform the ILL in good time) will be deducted from your reimbursement.
  • ILL pays for the number of experiment days allocated (given on the invitation form) + 1 additional day. Extra days of beamtime allocated at short notice by the instrument responsible may be reimbursed after confirmation by the Instrument Responsible or Local Contact.

ILL Travel Office
: accommodation(at) - phone: +33 (0)476 20 74 87 - fax: +33 (0)476 48 39 06