1. Access system global tests M. Gruwé LHCCWG January 15 th 2007

2. 38th LHCCWG2 Global tests  Organization: Organized by Silvia Grau and Pierre Ninin Organized by Silvia Grau and Pierre Ninin Performed by a big team of TS/CSE Performed by a big team of TS/CSE In collaboration with AB/OP (to help searching LHC, giving access, driving EIS-beam equipment, etc…) In collaboration with AB/OP (to help searching LHC, giving access, driving EIS-beam equipment, etc…)  From Monday 7 th to Sunday 13 th January

3. January 15th 200738th LHCCWG3 Monday 7 th – Sunday 13 th January  Monday: move the system from “installation” to “operation” configuration (Move from “Myfare” to “Inside”) move the system from “installation” to “operation” configuration (Move from “Myfare” to “Inside”)  Tuesday to Thursday: closing and searching the whole LHC closing and searching the whole LHC  Thursday evening to Saturday evening: tests tests  Sunday: move the system back to “installation” mode so that the access procedure is simplified (Move from “Inside” to “Myfare”) move the system back to “installation” mode so that the access procedure is simplified (Move from “Inside” to “Myfare”)

4. January 15th 200738th LHCCWG4 Closing and searching the LHC  Tuesday morning: point 8, including LHCb (about 5 hours) point 8, including LHCb (about 5 hours)  Tuesday afternoon: points 7 and 6 (about 4 hours) points 7 and 6 (about 4 hours)  Wednesday morning: points 4 and 5, except CMS (about 5 hours) points 4 and 5, except CMS (about 5 hours)  Wednesday afternoon: points 2, 3 and 1.8, except ALICE (about 4 hours) points 2, 3 and 1.8, except ALICE (about 4 hours)  Thursday morning: point 1, except ATLAS (about 1 hour) point 1, except ATLAS (about 1 hour)  Thursday afternoon: ALICE, ATLAS and CMS (whole afternoon) ALICE, ATLAS and CMS (whole afternoon)

5. January 15th 200738th LHCCWG5 Closing and searching the LHC  Comments (I): In most cases, no real patrol of the various sectors but a simplified quick search: In most cases, no real patrol of the various sectors but a simplified quick search: All patrol boxes have been rearmed and sectors quickly searched.All patrol boxes have been rearmed and sectors quickly searched. Patrol circuits described in various edms documents have not been used. These will have to be validated independently, later on.Patrol circuits described in various edms documents have not been used. These will have to be validated independently, later on. Plombage: Plombage: All emergency exit handles on all doors and access points have been provided with a “plombage”:All emergency exit handles on all doors and access points have been provided with a “plombage”: It is still possible to open the door by the standard way (unlock button) It is still possible to open the door by the standard way (unlock button) It is also still possible to open it with the emergency handle, but the “plombage” has a very dissuasive effect: people think before acting! It is also still possible to open it with the emergency handle, but the “plombage” has a very dissuasive effect: people think before acting! After the tests, the “plombages” have been left on most doors (to start educating people)After the tests, the “plombages” have been left on most doors (to start educating people)

6. January 15th 200738th LHCCWG6 Closing and searching the LHC  Comments (II): Some people were still working in the sectors being searched: Some people were still working in the sectors being searched: This was foreseen (list of people was provided by the various groups having to make interventions).This was foreseen (list of people was provided by the various groups having to make interventions). Situation not easy to handle, but in general people were cooperative and following instructions.Situation not easy to handle, but in general people were cooperative and following instructions. Access to experiments allowed throughout the whole week: Access to experiments allowed throughout the whole week: Some grids have been removed around access points to allow access to experiments during the week.Some grids have been removed around access points to allow access to experiments during the week. One guardian was placed next to each missing grid to control access to experimental zones.One guardian was placed next to each missing grid to control access to experimental zones. Overall, no interference with the tests except for one case: one a person in Atlas opened (forced) a door between the Atlas cavern and the service area (search of the service area had to be redone) even though there was a big warning sign post.Overall, no interference with the tests except for one case: one a person in Atlas opened (forced) a door between the Atlas cavern and the service area (search of the service area had to be redone) even though there was a big warning sign post.

7. January 15th 200738th LHCCWG7 Closing and searching the LHC  Duration: Time foreseen: 3 full days Time foreseen: 3 full days Was done faster than expected (but keep in mind it was a simplified quick search, not a real one) Was done faster than expected (but keep in mind it was a simplified quick search, not a real one) Unfortunately: could not start the tests earlier than foreseen as it was agreed to search the experiments not earlier than Thursday afternoon Unfortunately: could not start the tests earlier than foreseen as it was agreed to search the experiments not earlier than Thursday afternoon

8. January 15th 200738th LHCCWG8 Tests  Tests in access mode: One or more EIS-beam becomes unsafe One or more EIS-beam becomes unsafe  Tests in beam mode: One real AUG One real AUG One door is forced One door is forced Discordance between two signals Discordance between two signals

9. January 15th 200738th LHCCWG9 Tests in access mode  Initial state: Whole LHC fully searched. Still in access mode (potentially some people in). Whole LHC fully searched. Still in access mode (potentially some people in). All EIS-beam should be safe, so that it is impossible to circulate or even inject beam in LHC. All EIS-beam should be safe, so that it is impossible to circulate or even inject beam in LHC. Note: EIS-beam are Note: EIS-beam are some power converters and corresponding 400V or 18kV cells (should be off),some power converters and corresponding 400V or 18kV cells (should be off), some TEDs (should be in),some TEDs (should be in), electron stoppers (should be closed),electron stoppers (should be closed), etc…etc…

10. January 15th 200738th LHCCWG10 Tests in access mode  Test: One EIS-beam becomes unsafe: Result: Result: the system goes to access offthe system goes to access off  Test: Two EIS-beam become unsafe: Result: Result: the system goes to access offthe system goes to access off and BIW (Beam Imminent Warning) sirens startand BIW (Beam Imminent Warning) sirens start  Systematic tests done, for each EIS-beam, one after the other.  Tests were successful.

11. January 15th 200738th LHCCWG11 Tests in beam mode  Initial state: LHC fully searched and closed (leaving some people in, on purpose, for the tests) LHC fully searched and closed (leaving some people in, on purpose, for the tests) LHC access off (BIW sirens) LHC access off (BIW sirens) Change to beam mode Change to beam mode EIS-beam un-safe (power converters on, TEDs out, etc…) EIS-beam un-safe (power converters on, TEDs out, etc…)  From inside LHC: force one door or one AUG: As a consequence: As a consequence: Beam mode is offBeam mode is off Radiation veto is onRadiation veto is on All EIS-beam to safe positionAll EIS-beam to safe position Signal sent to dump systemSignal sent to dump system Signal sent to BIC is falseSignal sent to BIC is false  A sample of all types of doors tested: inter-site doors, sector doors, end of zone doors, trapdoors, ventilation doors, access point (both PAD and MAD), etc…  At least two EIS-access per LHC site  All inter-site doors  One real AUG done in point 7

12. January 15th 200738th LHCCWG12 Outcome of the tests (I)  In general: LASS (LHC Access Safety System) behaves as it should LASS (LHC Access Safety System) behaves as it should Human interface to LACS (LHC Access Control System) works fine but should be improved (slow response, could be more human friendly, occasional restart of the application) Human interface to LACS (LHC Access Control System) works fine but should be improved (slow response, could be more human friendly, occasional restart of the application)  Some minor non-conformities to be fixed  Few relays had to be changed, few problems solved on line  One serious problem to be investigated, understood and resolved: In one occasion: non-detection of a missing key in a pad key distributor In one occasion: non-detection of a missing key in a pad key distributor

13. January 15th 200738th LHCCWG13 Outcome of the tests (II)  Some behaviors remain to be understood: First time LHC went to access off, BIW did start as expected, but then series of problems: evacuation siren in point 6, fire alarm and ODH alarms in point 6, AUG in point 8. All false alarms, but resulting in fire-brigade interventions. First time LHC went to access off, BIW did start as expected, but then series of problems: evacuation siren in point 6, fire alarm and ODH alarms in point 6, AUG in point 8. All false alarms, but resulting in fire-brigade interventions. Lesson learned:Lesson learned: Inform the fire-brigade before each test Inform the fire-brigade before each test Instruct the firemen about how to enter the LHC without forcing doors (useful in this specific case when we “know” it is a false alarm) Instruct the firemen about how to enter the LHC without forcing doors (useful in this specific case when we “know” it is a false alarm) Some problems to drive the EIS-beam equipments: Some problems to drive the EIS-beam equipments: In one occasion TEDs could not be moved. Still unclear why.In one occasion TEDs could not be moved. Still unclear why. In one occasion: LASS saw TEDTI8 “OUT” (actually “not IN”) although it was “IN”. Is that a problem of “end position” contact?In one occasion: LASS saw TEDTI8 “OUT” (actually “not IN”) although it was “IN”. Is that a problem of “end position” contact? Electrical problems with two power converters (warm magnets in point 3 and 7) (to be discussed with equipment responsible)Electrical problems with two power converters (warm magnets in point 3 and 7) (to be discussed with equipment responsible) etc…etc…

14. January 15th 200738th LHCCWG14 Outcome of the tests (III)  Other comments: The system tested was not in its full nominal configuration: The system tested was not in its full nominal configuration: Some doors not included in the system:Some doors not included in the system: to allow access to experimental areas during the tests to allow access to experimental areas during the tests some trapdoors not installed yet some trapdoors not installed yet some ventilation doors not properly included some ventilation doors not properly included SSA (System Safety Atlas) not ready and therefore not included in testsSSA (System Safety Atlas) not ready and therefore not included in tests The new LASS console was not installed yet.The new LASS console was not installed yet. Some more tests will have to be foreseen Some more tests will have to be foreseen

15. January 15th 200738th LHCCWG15 Outcome of the tests (IV)  Other issues to be thought about and discussed with DSO: Searching RF zones (including RF cavern): responsibilities? Procedure? Safety issues. Searching RF zones (including RF cavern): responsibilities? Procedure? Safety issues. BIW when two EIS-beam go unsafe: should actually be “evacuation siren” rather than BIW BIW when two EIS-beam go unsafe: should actually be “evacuation siren” rather than BIW Power converter and corresponding cell are currently considered as two independent EIS-beam: should be considered as a single one, as they are not independent from each other Power converter and corresponding cell are currently considered as two independent EIS-beam: should be considered as a single one, as they are not independent from each other OP should have a portable ODH detector available in the CCC OP should have a portable ODH detector available in the CCC

16. January 15th 200738th LHCCWG16 Outcome of the tests (V)  Excellent collaboration between TS-CSE and AB  Overall a very successful and interesting week  To be followed by DSO and OP acceptance tests