Registration at CERN

When coming to CERN from an outside institute to participate in an experiment, you have to register as a so-called "Unpaid Scientific Associate" (called "User") via the CERN Users' Office (bldg 61-R-020) .

If you are registering for the first time you should start the registration procedure by using the on-line pre-registration tool (PRT) which should be launched by your teamleader ).  All teamleaders and deputy teamleaders must ensure that their user registration and hence CERN computing accounts are always valid. If your institute is new to ISOLDE and does not yet have a nominated teamleader please contact the ISOLDE User Support Office.

The home institute declaration, which can be downloaded from, should be attached to the Pre-Registration (PRT) document as well as the other required documents listed at The home institute declaration must be signed by someone from your institute's administration (HR) or management (institute Head or Director). Please note that your teamleader and deputy are not allowed to sign the home institute declaration.  The minumum period of registration, even if you will be at CERN for a shorter period, is one month but please register for as long a period as possible which is better for ISOLDE and to avoid having to register every time you come to CERN. The maximum period for a first registration is 3 years and after that it is 5 years. Once your registration is complete you can pick up your access card from building 55 near the CERN main entrance.

ISOLDE is classed as a "Simple Controlled Radiation Area" so while participating in an experiment you will require a radiation dosimeter. When your USER registration is completed you can get a Permanent dosimeter from the CERN dosimeter service on the ground floor of building 55 (open Monday to friday from 08:30 to 12:00). For details on the procedure to follow (i.e. courses to complete and documents required) please see . When your Pre-Registration (PRT) has been accepted by the Users office you will receive an email telling you how to apply for your CERN computing account so that you can complete the necessary on-line safety courses before you come to CERN.

Please make sure that your CERN registration and "certificate attesting the suitability to work in CERN's radiation areas" are kept up to date. If your registration has run out, you will have to reregister as if you were coming to CERN for the first time.

All visitors should inform the Users' Office of any change in their data, such as change of institute, of private address, personal status, or change of percentage of presence at CERN

More information about how to get access to the ISOLDE Experimental Hall can be found here.

Getting around CERN: Information about free CERN bike and car sharing can be found here.

Information about short term child care can be found here.

Accident insurance

If you require an additional accident-at-work insurance, there are two affordable offers that cover the pure risk of life: death and disability (they do not cover the medical expenses). These are:

HELSANA insurance: it requires a CERN team account for payments (i.e. users cannot pay themselves); the subscription takes place by faxing a subscription form (see table below) to Helsana; the insurance is managed centrally, so there is no confirmation sent back; if you do require a confirmation, please contact the CERN-DG-LS unit; a summary of insurance coverage can be found in the table below.

UNIQUA Accidenta, for which everybody can pay individually. Details of how to subscribe and what is covered are given here.

Health insurance

For  information about health insurance for Associated Members of the personnel ( including USERs, Cooperation Associates and Visiting Scientists) please refer to

PDF icon Helsana-form.pdf38.67 KB
PDF icon Summary HELSANA MPA INSURANCE.pdf82.69 KB

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