1. Highlights of RP activities in support of ISOLDE operation and projects Joachim Vollaire, Alexandre Dorsival and Christelle Saury with material from others

2. Outline  Support to activities during the winter shutdown  Radiation measurement campaign (shielding assessment)  Studies for the robots (target handling) replacement project  Conclusions 07-DEC-20112ISOLDE Workshop and Users meeting 2011

3. Outline  Support to activities during the winter shutdown  Radiation measurement campaign (shielding assessment)  Studies for the robots (target handling) replacement project  Conclusions 07-DEC-20113ISOLDE Workshop and Users meeting 2011

4. Shutdown : Transport of used targets 4 From ISOLDE target area to storage area at CERN  First intervention in the target area (to reduce the dose rate)  Use of “Type A” container for the transport of 24 targets  Average dose rate : 2.18 mSv/h @ 40 cm and 8.1 mSv/h max.  Collective dose of 982 man.  Sv for the whole operation  Lessons learnt will be used for transport in 2012 07-DEC-2011ISOLDE Workshop and Users meeting 2011

5. Replacement of GPS FE#4 by FE#7 5  Replacement of GPS FE (HRS done in 2010)  Very complex interventions involving several groups  Collective dose: 7.6 man.mSv 07-DEC-2011ISOLDE Workshop and Users meeting 2011

6. Front End maintenance 6 Example : Replacement of extraction electrode  Permanent improvement of processes following RP recommendations  Example: development of new tool for extraction electrode replacement  HRS FE#6 maintenance in 2011 : 3.7 man.mSv 1 Sv/h on contact (with  emitters) + very high contamination 07-DEC-2011ISOLDE Workshop and Users meeting 2011

7. Outline  Support to activities during the winter shutdown  Radiation measurement campaign (shielding assessment)  Studies for the robots (target handling) replacement project  Conclusions 07-DEC-20117ISOLDE Workshop and Users meeting 2011

8. Shielding efficiency assessment 8  Motivations:  Linac4 injector for the PS Booster  PS Booster energy from 1.4 GeV to 2 GeV  HIE-ISOLDE project  Can ISOLDE “digest” the energy and intensity increase ?  Extensive radiation measurement campaign performed in 2010-2011  Shielding performances is one of many RP aspects to address ! 07-DEC-2011ISOLDE Workshop and Users meeting 2011

9. Original beam parameters for design… 907-DEC-2011ISOLDE Workshop and Users meeting 2011 Design: 2.2  A @ 1.0 GeV = 2.2 kW Today : 2  A @ 1.4 GeV = 2.8 kW Future: 4  A @ 2.0 GeV = 8.0 kW ?

10. Measurement and shielding assessment 10  Measurements in accessible areas outside and inside the hall  Normalization of measured dose rate to the beam intensity  Use of 3D models to reconstruct shielding material thickness Measurement location Beam dump HRS 07-DEC-2011ISOLDE Workshop and Users meeting 2011

11. Results summary 11 HD target 07-DEC-2011ISOLDE Workshop and Users meeting 2011

12. FLUKA studies (Y. Romanets – ITN Lisbon) 12  Comparison measurements calculations  Study of energy increase effect and improvement of the shielding 07-DEC-2011ISOLDE Workshop and Users meeting 2011

13. Outline  Support to activities during the winter shutdown  Radiation measurement campaign (shielding assessment)  Studies for the robots (target handling) replacement project  Conclusions 07-DEC-201113ISOLDE Workshop and Users meeting 2011

14. FLUKA study for the new robots project 14  Current robots used for the target replacement arriving at the end of their lifetime  New concept considered (AGV)  FLUKA calculations needed to assess the robot exposure to radiations  Two concepts have pros / cons 07-DEC-2011ISOLDE Workshop and Users meeting 2011

15. FLUKA studies : Example UCx on HRS 15  Dose rate calculations for recovery scenario  Several Sv/h on contact with the target (after 72 h of decay) 07-DEC-2011ISOLDE Workshop and Users meeting 2011

16. Close view of the residual dose rate 16  High reliability or remote recovery needed as significant cooling time required before any human intervention 07-DEC-2011ISOLDE Workshop and Users meeting 2011

17. Robot exposure in parking position 17  Damage to electronic components in parking position (“currency” is the 1MeV neutron equivalent)  Damage to organic component  Relocate sensitive electronic outside 07-DEC-2011ISOLDE Workshop and Users meeting 2011

18. Outline  Support to activities during the winter shutdown  Radiation measurement campaign (shielding assessment)  Studies for the robots (target handling) replacement project  Conclusions 07-DEC-201118ISOLDE Workshop and Users meeting 2011

19. Conclusions 19  Very busy year to support operation (FE exchange)  Shielding assessment (thanks to extra RP resources available since 2 years)  Baseline for shielding improvement studies  Update of some areas classification  Robot reliability critical considering the future intensity and energy upgrade (several issues with current system this year) for the availability of the facility  Many challenges ahead of us (HIE-ISOLDE)  How can you help us ? 07-DEC-2011ISOLDE Workshop and Users meeting 2011

20. Your are at home in ISOLDE ! 20 SORT YOUR WASTE AND ADOPT GOOD HOUSEKEEPING PRACTICE !!! 07-DEC-2011ISOLDE Workshop and Users meeting 2011

21. Your are at home in ISOLDE ! 21 SORT YOUR WASTE AND ADOPT GOOD HOUSEKEEPING PRACTICE !!! IN CASE OF QUESTION: CALL THE A-TEAM ! 07-DEC-2011ISOLDE Workshop and Users meeting 2011