Safety at TOMCAT
Also please make sure you know how to behave correctly in case of emergencies and alarms at PSI.
The safety of users and staff has the highest priority for the Paul Scherrer Institut (PSI) in designing and conducting research and experiments. Therefore, we diligently adhere to the safety first principle:
PSI strictly requires that users and staff comply with all the institute's safety rules and regulations while working on the premises. It is your responsibility to follow the PSI general safety instructions to protect yourself and others.
Stop work authority
PSI safety guidelines
TOMCAT safety officer
|TOMCAT safety officer||phone number|
|Christian Schlepützfirstname.lastname@example.org||+41 56 310 40 95|
Safety training and beamline orientation
Before arriving at PSI, all users are required to complete a brief online safety training that covers general safety issues related to working at PSI. Additionally, everyone coming to PSI has to confirm notice of the PSI regulation "Usage and Monitoring of IT Resources at PSI" when requesting the badge and dosimeter in the DUO system.
At the beginning of your experiments, this general training is complemented by a mandatory on-site safety training and TOMCAT beamline orientation that will point out specific details about the operation and safety features and emergency equipment present at the TOMCAT beamline. This beamline orientation will be administered by your TOMCAT local contact and is required for all members of external user groups. Prior to conducting experiments at TOMCAT, the PI or leading researcher of each user group must also complete and sign the facility’s safety declaration form.
Printed copies of the beamline orientation and the safety declaration form are available at the TOMCAT beamline.
Use of the sample preparation lab at TOMCAT
Separate tools are provided for work with either normal samples (blue boxes), or any biological samples (green boxes). Please always use the appropriate equipment and make sure they do not get mixed up.
Please keep the work area clean at all times and follow the posted instructions. After your experiments, clean up all work areas and remove all of your own equipment. Wipe down the work area with normal lab alcohol (70%) and leave the place in such as state as you would like to find it in when you arrive for your own experiments.
Sample fridge and freezer
Note that this fridge is strictly for sample storage - Never store any food or drinks in this fridge!
Food and drinks at the beamline
Also note that food/drinks and samples/chemicals have to be kept strictly separat. Therefore, no food or drinks are allowed in the sample preparation lab and the experimental hutch. Vice versa, no samples or chemical can be used in the control room and compute lab.
As a courtesy, TOMCAT provides a small food fridge in the compute lab, where users can store snacks and drinks for the duration of their experiments. Please label all of your fridge items and remove them from the food fridge and clean the fridge upon your departure. Never store any food in the sample fridge!
Note that the experimental hutch is a radiation-controlled zone, and it is therefore absolutely forbidden to bring any food or drinks into the hutch!
These additional safety issues must already be declared upon proposal submission. We strongly encourage users to contact beamline personnel well in advance of submitting a proposal and again before performing actual experiments to ensure that all necessary permissions and safety measures are in place.
Note that experiments are only allowed to begin once all required approvals are present, the safety training has been completed, and all safety measures are in place.
Work involving chemicals
When chemicals are used to prepare samples or as a part of the actual measurements, special care must be taken. Consult the General directive for activities involving chemicals at PSI for further information and guidelines.
Always label all containers containing any form of chemicals at the beamline, even if they are only used as temporary storage. Make sure that you have up to date safety data sheets (SDS, formerly also know as MSDS) available for all of your chemical substances, along with the required standard operation procedures (SOP) and the necessary safety equipment. Always use the proper PPE (personal protection equipment, e.g.: gloves, etc.) when handling chemicals. Potentially dangerous work should never be performed alone. Also prepare for your experiments by carefully noting the locations of emergency equipment (chemical shower, eye wash solution, etc.).
Depending on the chemical processes required, the sample preparation lab at TOMCAT and the laminar flow hood available in the mechanics and laser testing lab adjacent to the beamline might not be sufficiently secure and well equipped to carry out the work. Instead, users should request access to the shared user chemistry laboratory of SLS. To do so, check the corresponding box ("I intend to use the SLS chemistry laboratory WSLA/028") when applying for your badge and dosimeter through the DUO system prior to your arrival at PSI. Consult the chemistry lab user manual for further information on its usage rules and the available equipment.
The use of lasers poses potential safety risks. For information and official regulations on the use of lasers at PSI, please consult the General directive for activities involving lasers at PSI.
Always wear laser safety goggles when necessary!
TOMCAT laser furnace
TOMCAT features a dedicated infrared laser furnace for sample heating, powered by two 150 W infrared class 4 lasers, which is routinely available for user operation. If you request to use this device, please contact a beamline staff for more information and to coordinate the necessary procedures for the laser use.
Special safety instructions are required before using these lasers, and all members of the experimental team are required to read and sign a liability waiver.
User-owned laser systems
User-owned laser systems can be used at TOMCAT, provided they meet the necessary safety criteria and the operation adheres to established standard operation procedures. The required safety approval steps depend on the type of laser to be used:
Class 1 and class 2 lasers
Class 1 and 2 lasers are deemed to be safe for work at PSI, and no special safety precautions are required. These systems can be used for user experiments without further issues.
Class 3B and class 4 lasers
Class 3B and 4 lasers will require special safety approval and dedicated interlock systems to be integrated at the beamline. Contact beamline personnel well in advance of planning experiments to initiate the necessary safety work and approval processes for these types of lasers.
Again, special safety instructions are required before using these lasers, and all members of the experimental team are required to sign a liability waiver.
Pathogenic and genetically modified materials
The TOMCAT beamline is equipped with all necessary safety measures and equipment (laminar flow hood, personal protective equipment (PPE), and cleaning agents) to conduct experiments on biological samples covered under the biosafety level 1 and 2 categories (BSL-1, BSL-2).
Users conducting experiments with pathogenic and genetically modified samples must indicate this already in the proposal and are required to contact TOMCAT staff (usually the local contact) well in advance of the experiments to make sure all necessary safety measures can be put in place before the experiments.
More information and guidelines for working with biological samples are provided in the Safety concept for activities involving pathogenic and genetically modified organisms at the Paul Scherrer Institute.
In vivo experiments
Experiments involving invertebrates or vertebrates, either in vivo or post mortem, require special attention and very careful preparation. It is essential that you contact beamline personnel well in advance when planning such experiments to discuss all relevant issues (experiment feasibility, ethical considerations, import/export restrictions, permits, housing at the beamline, etc.) ahead of proposal submission. Keep in mind that a significant amount of additional paperwork may be required and take the response time of local and foreign authorities into account when applying for documents and permits.
Important Note: The beamtime allocated by the PRC for experiments involving live specimens will only be definitively scheduled for TOMCAT beamtime after all of the necessary permits are in place and have been approved. If the experiments have not yet been fully approved by the time we schedule the upcoming beamtime cycle, the allocated shifts may be postponed to a next cycle, contingent on the necessary approvals. We therefore strongly recommend to have all required permits ready at proposal submission time to avoid delays in obtaining beamtime at TOMCAT.
Special rules and regulations govern the use of nanomaterials at PSI. Please consult the General directive for activities involving Nanomaterials at PSI for further information, and discuss potential hazards with your beamline local contact.
At present, TOMCAT is not equipped to conduct experiments with radioactive samples. This situation can be potentially re-evaluated if a solid scientific case for it can be presented, but at the moment this is not actively pursued. Contact beamline management if you have a use case that convincingly demonstrates that the current policy should be re-evaluated.