What do I do with my dosimeter after my visit?

Before you leave, return your dosimeter to your SLAC Security or your User Administrator.

Do I need to wear a dosimeter?

The law requires radiation dose measurements for individuals working in areas where they may exposed to radiation; see dosiimetry and radiological environmental protection FAQ. You are required to wear a dosimeter while working in or visiting areas that are defined as:

  • Radiologically Controlled Areas
  • Radioactive Material Storage Areas
  • Radiation, High Radiation, and Very High Radiation Areas
  • Contamination Areas

Although radiation levels are low at most SLAC locations, we measure personnel radiation doses to ensure that dose levels are "As Low As Reasonably Achievable" - ALARA - and keep records that are required by the Department of Energy.

Radiological Worker Training (RWT) and an RWT dosimeter is needed for individuals who will handle radioactive material or who are identified as radiological workers.

What mechanisms are available to provide feedback to the facilities?

We welcome and encourage user feedback. Users can provide feedback by contacting their User Administrator or SLAC Beam Line Point of Contact. Additionally, SSRL and LCLS users are asked to complete the end-of-run survey after each scheduled experiment, log in to the user portal to review scheduled experiments and submit a survey . User feedback helps us to continue to improve our service and to meet DOE reporting requirements.

Also contact the Safety Officer, management or users organizations to discuss questions or provide feedback or suggestions.

How do I get more information or get more involved in issues of interest to the user community?

The user facilities have user’ organizations that broadly represent the scientific user community to management and to the general public. For additional information, contact any elected member of the SSRL Users' Organization Executive Committee or LCLS Users' Organization Executive Committee or SLUO. Participate in user conferences and workshops which are valuable opportunities to learn about the latest plans, new developments and exciting user research as well as interact with other scientists and potential collaborators.

The SLAC user facilities participate in SSURF and the international consortium Lightsources.org. To obtain additional information or to get more involved in supporting national science initiatives, users may also want to contact scientific associations such as the American Chemical Society, American Physical SocietyGeochemical Society, International Union of Crystallography, Materials Research Society.

How can I learn about new developments and user research at the facilities?

User facility capabilities and user research is highlighted regularly on the user facility (FACET, LCLS, SSRL) and SLAC websites. To stay informed about facility developments, user research and other important news, visit or subscribe to SLAC Signals, SLAC Events, SLAC Breaking News, RSS, SSRL newsLCLS news or FACET/Test Facilities news.

Who should I inform about my research publications?

Contact your User Administrator and SLAC scientific contact whenever exciting results are about to be published. We can work with users and the SLAC Office of Communications to develop the story and to communicate user research findings to a much broader audience. Information on user publicaitons is extremely important as metrics of scientific achievements and productivity as well as meeting reporting requirements to our funding agencies.

How do I find or contact a specific individual at SLAC?

To find contact information for individuals at SLAC, reference the SLAC directory or the Stanford University directory. SLAC Security Officers (650-926-2551) may also provide general telephone assistance.

What should I do in case of an accident, injury or emergency while at SLAC?

In the event of an emergency or life threatening situation while at SLAC, immediately call 911, then call SLAC extension 5555 from any SLAC telephone (650-926-5555). While at SLAC, also notify your SLAC Contact, Safety Officer, Duty Operator/Floor Coordinator. There is an Occupational Health Center at SLAC which is open Monday-Friday 8 AM-5 PM in Building 28, Room 11 for non-life threatening injury assistance, counseling and other wellness services.

What safety training is needed to work at the user facility?

A large variety of potentially hazardous materials, processes and equipment can be present at the user facilties, and we take very seriously the challenges of user safety. SLAC uses the integrated safety and environmental management system (ISEMS) to bring safety and environment into work practices at all levels. Each person who uses the facilities shares in the responsibility of ensuring a safe workplace and compliance with federal, state, local and SLAC workplace safety regulations. Contact the user facility safety officers if you have questions or need assistance.

No person may participate in any experimental activity at SLAC unless he/she has been identified by the proposal spokesperson as a member of their experimental team for a scheduled experiment, has complied with access requirements, and has completed the web-based training courses before arrival.

Users must complete several safety training courses online BEFORE arriving at SLAC to receive a new badge (or renewed proximity access on their current badge). Log into the new training portal (link is external) and ensure that ALL of these training courses have been completed. Review instructions at https://slactraining.slac.stanford.edu/how-access-the-web-training-portal), enter you SLAC ID# (find SID# in the user portal or the SLAC Directory) and the temporary password, SLACtraining2005!. Users need to change the password to their own personal password after first time log in. Remember your password, or to request a new password submit the password request form https://slactraining.slac.stanford.edu/training-portal-password-request. 

  • Use the search option to locate these courses (or click the WEB TRAINING CATALOG, then open the User Training Folder). Select, launch and complete these courses:
  • Course 219 - ESH Safety Orientation
  • Course 115 - General Employee Radiation Training (GERT)

  • Course CS100 - Cyber Security Training for Lab Users

Please notify useradmin@slac.stanford.edu or slac-training@slac.stanford.edu if you encounter problems with required training.

Additional training may be required depending on the user facility or the potential hazards associated with your proposed experiment.

How and when are potential safety issues associated with my proposal reviewed and controlled?

A. We take very seriously the challenges of user safety. Everyone who uses the facilities shares in the responsibility of ensuring a safe workplace. This includes planning experiments properly, taking extra efforts in identifying related hazards, and working closely with us to develop mitigations and controls.

SLAC is committed to protecting the health and safety of on-site personnel, the public, and the environment as it carries out its scientific mission. Consistent with SLAC's Integrated Safety and Environmental Management System (ISEMS), job/task specific hazards and controls are covered by a work planning and controls (WPC) process which plans for safe work by identifying tasks and their hazards, establishing controls to mitigate risks, documenting results and monitoring effectiveness. Each person who works here is required to be familiar with the hazards associated with his/her work and experiment, the hazards associated with work areas, and to properly implement all necessary training, procedures and protocols for mitigation of those hazards. Work planning and controls require that users plan experiments properly, take extra effort to identify potential hazards, and work closely with us to develop mitigations and implement controls. Consider and apply these steps (as well as the environmental impact of all tasks performed):

For users, including visiting scientists and students, this safety review is conducted each time a proposal is submitted or scheduled to use the user facility, so it is important that proposal spokespersons/PIs fully disclose any potential hazards when submitting a proposal, requesting access, or before arrival. This process prompts the training, controls, procedures, and personal protective equipment necessary to safely complete experiments or activities by seeking the participation of those who will perform the work.

The proper use, storage and disposal of hazardous substances is critical to maintaining a healthful workplace and protecting the environment. All experimenters, especially Proposal Spokespersons and PIs, are responsible for informing the Safety Officer of hazardous substances they wish to bring, and to arrange for their proper shipment, storage and disposal. The Safety Officer can arrange for storage and waste containers.

All work at SLAC requires review prior to authorization and release. A knowledgeable SLAC employee, such as the Safety Officer, Facility Scientist or Engineer, will review the proposed experiment and potential hazards with the user to ensure that the procedure follows best known methods/practices and that the user can adequately explain the steps, hazards and controls of the procedure. Work authorization is dependent on required ES&H training, agreements, and safety checklists. Should the experimental conditions change, re-authorization is required to ensure that potential hazards that may have been introduced are controlled.Everyone who uses the facility must immediately report any unsafe work practices or safety concerns to the Safety Officer, Duty Operator, Floor Coordinatorand/or staff to continue to keep our user facilities safe.

In addition to commonly accepted hazards, SLAC is in a high earthquake risk area. In the event of an earthquake, 'duck and cover under a table or against an inside wall'. Be aware that objects can shift suddenly, so it is important that equipment be earthquake braced. Be aware of your surroundings and the nearest emergency exits. Wait until the shaking has stopped before trying to leave the building. When safe and instructed to do so after an earthquake, fire or other emergency, proceed to the nearest emergency assembly area.

In the event of an emergency or life threatening situation while at SLAC, immediately call 911 or extension 5555 from any SLAC telephone (650-926-5555). While at SSRL or LCLS, also notify your supervisor, the Duty Operator, Floor Coordinator, or Safety Officer.

No alcoholic beverages may be consumed or stored on the SLAC site except when preapproved by the SLAC Director for special events at specific locations.

Smoking is prohibited in all enclosed buildings and facilities. Smoking is permitted only in designated outdoor areas away from doorways and ventilation systems.

Visitors, including children, may only enter experimental floor areas with pre-approval and a qualified escort for brief guided tours.

How do I ship equipment to/from the SLAC user facility?

Contact your User Administrator or SLAC Shipping for more information on shipments to and from the user facilities, see also http://www-group.slac.stanford.edu/fac/index.asp?id=shipping.

If, at the end of your experiment, you plan to ship samples, equipment or other scientific items from SLAC to a location outside of the U.S., please alert User Research Admnistration, review the instructions for international user shipments.

Do I need to establish a user financial account?

Most routine costs are absorbed by the user facility (e.g., common chemicals or gases), so there is usually no need to establish a user financial account. However, unusual requests, special services or items that exceed a threshold will trigger the need for a user financial account. Contact User Research Administration to determine if you should establish a user financial account. FACET users do not need a user financial account. The most common method of establishing or renewing a user financial account is by providing a purchase order (PO) (or a letter from the financial officer of the user institution). The PO should be made to SLAC National Accelerator Laboratory for the amount of expenditures desired to support user experiments. The PO should include the following information:

  • Name of Proposal Spokesperson, PI, users
  • Contact name and billing address for invoices
  • Amount authorized ($2,000 suggested minimum; contact staff if estimates needed for supplies or services)
  • Period covered, including expiration date
  • Funding agency, grant/contract number, and whether expenditures are taxable in California

Is a user agreement needed to work at the SLAC user facilities?

For all users there must be a user agreement between the user institution and Stanford University BEFORE users can visit or participate in any experiments at SLAC. A single user agreement covers all experimenters from that institution. Proprietary research, which users request confidentiality of proposal, data and results for a certain period of time, follows DOE and Stanford University guidelines and is executed through a Proprietary User Agreement. Proprietary research requires advance payment at the user facility's full-cost recovery rate which is updated annually and established as a dollar rate for each shift of beam time. Experimenters interested in conducting proprietary research should contact User Research Administration well in advance of the anticipated need for beam time as the legal procedures and advance payment requirements may take several months to finalize.

Are there public transportation options to get around the local area?

The Stanford Marguerite provides FREE SHUTTLE SERVICE to several locations in the Palo Alto area. The SLAC line operates Monday-Friday (except holidays) between SLAC and Hoover Tower on the Stanford campus every 20-40 minutes from ~7:20 am-8:10 pm. The Guest House also provides complimentary shuttle service available evenings and weekends for guests; contact the front desk for more details.

For information on other Bay Area bus and train schedules, call CalTrain 800-558-8661,SamTrans 800-660-4287, or 408-321-2300 for other Bus and Light Rail Routes.

Enterprise Rent-A-Car is located on campus and offers a free pick-up service from the Stanford Guest House lobby. Guests can take advantage of discounted rates by mentioning the Stanford Guest House.

Enterprise Rent-A-Car
360 Oak Road
Stanford, CA 94305
(650) 833-8060

What are the food service or dining options available at or near SLAC?

The SLACafé is generally open weekdays:  Monday-Friday 8 am - 2:30 pm (except holidays). Verve coffee roasters operates a kiosk in front of the Guest House. There is also a Starbucks located at the Sharon Heights shopping center. See other dining facilities nearby and on the Stanford campus. See other food options at SLAC.

Where can I find lodging accommodations when I visit SLAC?

Users and visitors are encouraged to reserve accommodations at the Stanford Guest House which is located on the SLAC campus and conveniently located within a short walk to the user facilities. Guests have access to high-speed Internet access, a fitness center, a 24-hour reception desk, laundry facilities, and free parking. The Guest House offers single as well as shared rooms, and all rooms have their own bathroom, and at reasonable rates for the area. All rooms are non-smoking. Reserve 'USER' rooms on-line. During periods of peak demand, the Guest House sets aside rooms for users; access these rooms by identifying yourself as a 'user' and asking to be put on the wait list to be notified if rooms open up. There are several additional accommodations nearby. The SLAC Housing Office may also be able to provide advice about local rental properties.

What is needed to enter the security gate at SLAC?

Photo identification (ID) is required to enter the SLAC main gate. Users must review access requirements and inform User Research Administration of their planned arrival in advance. LCLS and SSRL users must be listed on scheduled user facility experiments (on the access list). Users must complete training in order to obtain a SLAC ID badge and proximity access. International users must bring their passport and visa documents to present to SLAC Security for access. Users from certain countries also need to forward additional information (including their passport bio page) in advance to obtain approval before visiting SLAC. In addition to SLAC's main gate, users need a SLAC ID badge to enter through Security Gates 17 or at Sector 30.

Where is the facility located?

SLAC is located at 2575 Sand Hill Road, Menlo Park, California 94025 USA. In general, the SLAC campus is open 24 hours a day. Directions to SLAC and site entry information are available online.

How can I use the user facilities?

The first step to access the user facilities is to submit a proposal. Proposals are peer reviewed, and the ratings are the primary criteria used to determine which proposals will be allocated time to use the facilities. Contact CryoEM, Stanford Synchrotron Radiation Lightsource (SSRL), Linac Coherent Light Source (LCLS) or Facility for Advanced Accelerator Experimental Tests (FACET) scientists to discuss facility capabilities and to ensure that the proposed experiments are feasible.

What happens if I get to SLAC late at night or on the weekends?

If you have a valid badge and your training and proximity access is up to date, then you should be able to swipe and go. Otherwise, you need to arrive weekdays during working hours.

If this is your first time or if your badge has expired (and you are a US citizen), Security will check to confirm that you’re on the User Access List which is linked to the registrations and approved proposals in the User Portal. So, if you’ve registered, are associated with a scheduled proposal/beam time/experiment, have completed training and other requirements, Security will be able to give an badge to let you through. If you arrive outside of working hours and you’re given a temporary badge, you need to visit the VUE Center on the next business day to complete your check-in and get your official ID.

If you’re a FACET/Test Beam Facility user, you will need to contact the FACET manager before traveling to SLAC so that advance arrangements can be coordinated.

International users are required to arrive weekdays during working hours with the appropriate identification, CV and other documentation. Before traveling to SLAC, review the access requirements for non-U.S. citizens as these have changed (access requirements for foreign nationals).

Most user ID badges/proximity access expire at the end of the current fiscal year (September 30th), so if you have an experiment planned from October to next September and haven't already checked in at the VUE Center, please review the access requirements before traveling to SLAC, particularly for non-U.S. citizens as these have changed (access requirements for foreign nationals).

If you haven’t registered in the User Portal with a scheduled experiment (therefore not on the User Access List) or have not arranged with your User Services Manager, we won’t be able to grant you access. However, if you are registered at the Stanford Guest House, then you will be able to proceed to the Guest House. After arrangements and requirements have been completed, you can go to the VUE Center to check in and obtain a SLAC ID. The best way to avoid this situation is to register and contact your user facility as soon as you know you want to conduct work at SLAC so the user office can process your registration and provide instructions to help you prepare to visit.

What if I arrive and I’ve forgotten to take my training and my badge has expired?

We recommend that you take your online training before you arrive as it will save you time. However, in the event that you can’t, then please enter SLAC through the Main Gate (as your badge won’t let you access Alpine Gate) and come to User Services in the VUE Center.   Online training can be taken in the training room and, once complete, you can receive your badge and be on your way.

If you also need practical training to ensure appropriate access to certain areas, then User Services may be able to help arrange that for you. In that case, you’ll be able to get a new badge with temporary, restricted access, and then once you’ve taken your practical training, Security can activate the appropriate access and, if appropriate, issue a new badge that reflects the new training status.

How do I know if my training has expired and if I need to retake it before I come?

To avoid headaches, check if your training is up to date before you get here by logging into the User Portal and from the ‘Welcome Page’ click on ‘Review SLAC training and access requirements' , then scroll down to check your training and proximity expiration dates.  If you need to take online training, we recommend you do it before you get here so you can maximize your time at the facility. Contact your user office or host if you have questions.

What if I already checked in for the user operations run, have a valid badge and all my required training is up to date?

What if I already checked in for the last user operations run, have a valid badge and all my required training is up to date? Do I still need to go to the VUE Center to be checked in, or can I go straight to the User Facility?

If you already have a valid badge with proximity access and your training is up to date, you can either enter SLAC in the “SLAC ID” lane at the Sand Hill Road Main Gate, or swipe your badge if you’re coming through the Alpine Gate, and proceed to your destination.

Most user ID badges/proximity access expire at the end of the current fiscal year (September 30th), so if you have an experiment planned from October to next September and haven't already checked in at the VUE Center, please review the access requirements before traveling to SLAC, particularly for non-U.S. citizens as these have changed (access requirements for foreign nationals).

If you don’t have an active badge, please use the Main Gate as you will not be able to access Alpine Gate. All users need to provide valid government-issued ID and check in with the VUE Center to obtain proximity access. Important:  Failure to comply with requirements will impact your ability to access SLAC facilities. 

What are the hours of operation for the VUE Center and its services?

User services, including badging, are generally available Monday to Friday 7 am-4 pm (closed on holidays):


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