LHCb - Underground Guide Basic training for LHCb guides EDMS - - PowerPoint PPT Presentation

EDMS No.2150881 (v.1.0.0)

LHCb - Underground Guide

Basic training for LHCb guides

Objectives of the course 1 2 3

Followed a visit with a qualified guide or a dedicated training session Read the relevant safety documents (EDMS 1137263, EDMS 977538) Successfully passed Module 1 of this e-learning course This e-learning course explains the procedures for underground visits to LHCb during LS2 which are organized by LHCb collaborators. It complements the safety documents:

• “Visits on the CERN site”, GSI-SH-1 (EDMS 1137263)
• “Visits of LHCb areas” (EDMS 977538)

In order to be a LHCb guide you need to have:

Conditions and restriction for visits

Conditions and restrictions for visits

Locations

Visits to the LHCb facilities at Point 8 are limited to:

• the ground floor and – if needed and available – the meeting room on the first

floor of building 3862 (SCX8);

• the exhibition area in buildings 2885 (SX8) and 2895 (SZ8), and the projection

room in building 2885;

• the visitor circuits in the UX85 cavern (building 2828), in particular the DELPHI

and LHCb visitor platforms. Exhibition area (building 2885) Projection room (2885/R-008) DELPHI visitor platform LHCb visitor platform + + + + X X X

Conditions and restrictions for visits

Safety

• Visits underground are only allowed when safety can be ensured (and can be

cancelled at short notice if this is not the case).

• Visits underground must be given by trained (and officially appointed) LHCb

guides. Radiation safety

• Visits underground are only allowed when it is guaranteed that beam will not

be present. During LS2, this will in general be the case.

• For LS2, the visit areas underground have been radiologically classified as

‘non-designated’.

Conditions and restrictions for visits

Physical conditions of visitors

• Persons participating in underground visits must be fit to climb stairways.
• Persons equipped with pacemakers, defibrillators, electronic medicine

dispensers, hearing aids or metal implants are authorized to access the LHCb underground area only when it is guaranteed that the dipole magnet is off for the duration of the visit. During LS2, the dipole magnet will in general be off. Visit organizers will be informed in advance if there is a possibility that the magnet might be on.

Conditions and restrictions for visits

Number and age of visitors (for underground visits)

• The number of visitors per guide must not exceed 12.
• School groups must include an accompanying adult (who can also be a

visitor) other than the guide.

• If there is no accompanying adult, the size of school groups is limited to six

visitors per guide.

• Children under the age of 12 are not allowed underground.
• Only two groups are allowed underground at the same time.

Roles and responsibilities

Roles and responsibilities

Visit Supervisor

The Visit Supervisor is the person responsible for the overall organization of the visit and is listed as “Responsible” in the IMPACT form She/he can also (but doesn’t have to) be one of the guides. The Visit Supervisor must be familiar with the relevant safety documents (EDMS 1137263, EDMS 977538) and ensure that:

• the safety rules and procedures for the visit are followed;
• the visit is conducted by qualified LHCb guides;
• visitors are informed in advance about access restrictions and dress code.

The Visit Supervisor is responsible for the accuracy of the data in the IMPACT form (names of the guides and their cellular phone numbers, number of visitors and guides). After the visit (s)he adds a comment to the IMPACT form, reporting any accident or incidents, and declares the IMPACT as finished.

Roles and responsibilities

Guide

As an LHCb guide, you will provide information about the LHCb experiment and detector (and to some extent also about CERN and the LHC). It is your responsibility to acquire the necessary knowledge. Documentation is available on the LHCb visits and outreach web pages and on CDS. As a guide you are responsible for the visitors in your group during the visit. In particular you have to:

• ensure the safety of the visitors; and
• ensure that no LHCb equipment is damaged.

As a guide for an underground visit, you must accompany the visitors at all times and bring them back safely to the surface!

Roles and responsibilities

Guide

To be appointed as an LHCb guide you must:

• have access to (and be familiar with) the LHCb cavern;
• have successfully completed this e-learning course;
• have participated in at least one visit with a qualified guide or followed a

dedicated training session;

• be familiar with the CERN rules and procedures for visits;
• register with the LHCb secretariat.

In order to register as a guide, send an email to LHCb.Secretariat@cern.ch stating in which of the languages you are willing to give visits, your nationality and the country of your home institute.

Before the visit

Before the visit

Preparing a visit

• Send an email to lhcb-visits@cern.ch with the proposed date and time of your

visit and the number of participants.

• If a visit is possible, the LHCb secretariat will take care of scheduling the visit

and submitting an IMPACT form, based on the information provided by the

• rganizer of the visit.

The IMPACT needs to be approved by the Technical Coordination team before the visit can take place.

• If the participants do not have CERN access cards, request visitor cards for

them (using the CERN Service Portal).

• Find guides for the visit (qualified guides can be contacted via lhcb-

guides@cern.ch). In case of an underground visit, make sure that all guides have valid access rights to the LHCb cavern.

Before the visit

Access rights

Make sure that you as a guide have the required accesses.

• All guides must have access to the LHCb surface facilities, i.e. LHCB_S

access rights in ADaMS.

• Guides to the underground LHCb facilities must in addition have access to the

LHCb underground area, i.e.:

• 1. have valid LHCB_U access rights;
• 2. have a valid personal dosimeter;
• 3. have valid training ranks for the UX85 area.
• You can check the validity of your access rights and the safety courses you

need to follow on ADaMS (http://cern.ch/adams).

Before the visit

Before going underground

Verify that the size of the group doesn’t exceed the allowed limit (taking into account the age of the visitors). Make sure that all visitors wear helmets and closed flat shoes.

✓ ✓

Before the visit

Before going underground

Helmets are available in the corridor towards the PZ85 access point (building 2895/SZ8). The cupboard in the SAS (2885/R-002) outside the control room contains spare safety shoes and flashlights.

Before the visit

Before going underground

Make sure that you as a guide have all necessary equipment.

• Spare equipment (flashlights, safety shoes) is available in the cupboard in the

SAS (room 2885/R-002) outside the control room.

• Make sure that you have a mobile phone with you and that its number is listed

in the IMPACT form. Safety helmet CERN access card Working headlight

• r flashlight

Safety shoes Personal dosimeter

Before the visit

Before going underground

Remind the visitors of the following safety rules. A paper-copy of this list is available next to the key cabinet in building 3862.

• 1. Safety of those working at CERN or visiting the laboratory is our highest

priority.

• 2. The experimental area contains a number of hazards that stem from
• perating the detector, e.g. gas systems, high voltage lines, magnetic fields

and possible low levels of residual radioactivity.

• 3. The magnet is currently off and will stay so during the visit, hence there are

no particular restrictions. OR The magnet is currently on. For this reason persons with pacemakers, defibrillators, electronic medicine dispensers, hearing aids or metal implants are not allowed in the underground visit.

Before the visit

Before going underground

Remind the visitors of the following safety rules. A paper-copy of this list is available next to the key cabinet in building 3862.

• 4. There is no residual radioactivity in the visit areas. If we would need to enter

the supervised area, the radiation level is very low and we have dosimeters to monitor it.

• 5. There are also always basic risks such as falls, trips and slips. It is forbidden

to climb metallic structures. In addition, many of the instruments, electronics, and other devices encountered in these areas are delicate and should only be handled by experts. We therefore ask to you stay in the areas marked for visitor access and designated by your guide and not to touch any of the equipment.

• 6. Eating and drinking are strictly forbidden while underground.
• 7. Should an alarm occur, please follow the instructions given by your guide who

will conduct you to the surface using the lift.

Before the visit

Before going underground

Take special care with people suffering from claustrophobia or vertigo.

• Warn visitors in advance that the PZ elevator is rather small and it may be

uncomfortable for people afraid of closed spaces.

• Warn visitors that the visitors platforms are at a certain height, in particular the

LHCb upper platform, and it may be difficult for people afraid of heights. If necessary you can stay with the group on the lower platform.

Before the visit

Before going underground

Read your personal dosimeter.

• Although the visit area is radiologically classified as ‘non-designated’ during

LS2, you may have to enter the supervised area of the cavern in case of an emergency evacuation.

• You should therefore read your personal dosimeter before going underground.

Dosimeter reader on the corridor towards the PZ85 access point (building 2895).

During the visit

During the visit

Going underground

To take the visitors underground you need to bypass the biometry check of the PZ85 access point.

• Pick up one biometry bypass key for the PZ85 access point and as many

access tokens as there are visitors (max. 12) from the key cabinet in building 3862. To open the cabinet you need to swipe your CERN card. This works only during the time window of the visit for which you are listed as a guide!

• Give one token to each visitor.

Key cabinet in 3862/R-201 containing biometry bypass keys and visitor access tokens.

During the visit

Going underground

• The visitor holds his/her token near the reader of one of the PZ85 access
• doors. When the first door opens, the visitor steps on the yellow square in the

cabin and stands still.

• Once the first door closes behind the visitor, you turn the biometry bypass key

and the second door opens to let the visitor through. Repeat the same procedure for each visitor.

• The visitors wait just after the access point for you to re-join them. As a guide

you follow the regular procedure for entering the zone (using your personal dosimeter and the biometry check).

• Take the whole group underground via the PZ elevator.

PZ85 access point.

During the visit

Going underground - Video

During the visit

Underground visit areas - DELPHI

The barrel of DELPHI, a LEP experiment the detector of which was located in the UX85 cavern, is visible just outside the elevator.

• To reach the DELPHI visitor platform go up the stairways you find on your left

when leaving the elevator, and follow the orange lines on the floor. Use the same staircase to return to the ground floor. Visits are strictly limited to this area!

During the visit

Underground visit areas - DELPHI

PZ85 lift DELPHI visitor platform

• B. 2828 Level W2
• B. 2828 Level U0

During the visit

Underground visit areas - LHCb

The visitor platform in the UX85B cavern provides a nice panoramic view of the LHCb detector. The structure has three floors: ground level, slightly below the beam line and slightly above the beam line.

• To reach the platform from the DELPHI side of the cavern, walk towards the

D1 – D3 barracks, pass between the barracks and DELPHI and then through the yellow door in the shielding wall. Return the same way you came in. Visits are strictly limited to this area! Opening the emergency door in the green fence towards the LHCb detector will trigger an alarm.

During the visit

Underground visit areas - LHCb

PZ85 lift LHCb visitor platform (top level)

• B. 2828 Level W2
• B. 2828 Level U0

After the visit

After the visit

Returning to the surface

• At the end of the underground visit take the group back to the surface via the

PZ elevator.

• At the PZ85 access point, each visitor has to swipe their token in front of the

reader in order to exit. The guide is the last person to exit.

• If the PZ lift does not work, contact the CCC Technical Infrastructure operator

(7 22 01) and/or the Fire Brigade (7 44 44) and follow their instructions. Intercom and telephone are located close to the lift door.

After the visit

Emergency evacuation

In case of an emergency evacuation alarm, keep calm and take the visitors in your group safely to the surface.

• Inform the visitors of the need to evacuate and ask them to follow you, walking

at a normal pace.

• If it is safe to reach the PZ elevator, take the visitors there. If necessary wait

for the elevator in the pressurised area (keeping the door closed).

• If it is not possible to reach the PZ elevator, enter the experimental cavern

through one of the emergency exit doors in the LHCb visitor area and cross the cavern to go to the PM elevator.

• Once on the surface, take the visitors to the assembly point in front of building

2890 (SY8) and wait for the Fire Brigade.

After the visit

Emergency evacuation

Normal evacuation paths from the DELPHI and LHCb visitor platforms. PZ85 lift

After the visit

Emergency evacuation

Emergency evacuation path from the LHCb visitor platform if it is not possible to go safely to the PZ elevator.

After the visit

After the underground visit

The guides:

• collect the tokens from the visitors;
• put the tokens and keys back in the cabinet; and
• inform the Visit Supervisor of any changes (e.g. number of visitors) or

problems that occurred during the visit. The Visit Supervisor adds a comment in the IMPACT form saying that:

• the visit went fine;  or
• that there were problems during the visit, 

and closes the IMPACT.

To complete this module, please go back to ‘MY LEARNING’ page and click on ‘Exam(s)’.

EDMS No.2150881 (v.1.0.0)