Status of Contributions, Draft Budget Request for 2005 and Outlook for the Longer Term Future Martyn Davenport 8 TH October 2004 CAST FRC-D

Status of Common Fund (T297400) General level of contributions from all institutes  Cash contributions kCHF (Table 1)  Expenditure inside institutes kCHF(Table 2)  Time profile of contributions and expenditures (Table 3 & 4 respectively) Sum over all years now amounts to M CHF  > 98% promised in MOU  Some institutes have exceeded their committements  Others still have outstanding committements ( 4.4 % of original MOU) Common Fund balance on  43.6k CHF (Table 3)

Table 1: Details of CF Cash contributions (up to ) Table 2 : Details of expenditure in collaborating institutes (excl. CERN) (up to ) Table 3: Common Fund Budget T (up to ) Table 4: Expenditure of collaborating institutes (up to )

Outstanding Committements Outstanding contributions from the CAST Institutes:  136 kCHF (4.4%)  These contributions are crucial to the successful and timely transition to Phase II in the first half of (see Section 3) CERN contribution to magnet operation (1265 kCHF):  Summary of magnet operation costs (see table 8)  995 kCHF used by end of 2004  Remainder can be used for the shorter program in 2005

Table 6 : Total financial Contributions as agreed in MOU - updated

Table 7 : Status of Common Fund Contributions (excl. CERN magnet operation)

Table 8 : Status of Common Fund Contributions (incl. CERN magnet operation)

Draft Budget Request is a transition year for CAST Program for 2005 (next slide) Draft operating budget must take into account  Maintenance of experiment (phones,rentals,infrastructure)  Extensions to Slow Control for Vacuum and 4 He system  Seed money for Cold Window R&D and ordering of final windows  Fees for external survey team  Mechanical support: designer and mechanic for small modifications in SR8  Subsistence/support for key personnel, including new doctoral student working on final 3 He gas system for 2006 Estimate is 156 kCHF

2005 program Modifications to magnet movement system and ‘Potence’ Detailed checking of magnet tracking behaviour Installation of a new vacuum system Preparation of a provisional 4 He gas system Opening of the magnet cryostat  Install cold windows and additional instrumentation Cool down and 4 He test filling of magnet cold bore  Quench tests  Commission gas system First low-pressure 4 He data taking runs (Second half 2005 – final design and ordering of Phase II gas system)

Table 5: Draft operating budget 2004

2005 is a transition year for CAST Program for 2005 (next slide) Draft operating budget must take into account  Maintenance of experiment (phones,rentals,infrastructure)  Extensions to Slow Control for Vacuum and 4 He system  Seed money for Cold Window R&D and ordering of final windows  Fees for external survey team  Mechanical support: designer and mechanic for small modifications in SR8  Subsistence/support for key personnel, including new doctoral student working on final 3 He gas system for 2006 Draft Budget Request 2005

2005 items not covered by request New vacuum system and provisional 4 He gas system  Funds have been earmarked by Freiburg for this (90kCHF) Mechanical modifications to magnet and Potence  New request to PH for 100kCHF as contribution to Phase II MOU Costs of final gas system and upgrades to CAST  Subject to a new MOU for the second phase  MOU under preparation (see later)

Overall financial situation and future outlook Operating budget 2005  2005 budget should normally be covered by a new MOU for second phase.  New MOU: Operating Budget ~ 3.5kCHF/person post doc or above in CAST  6 months delay  New funding will not available before 2H2005  Outstanding contributions to existing MOU crucial to operations in 1H2005 Summary of situation

Summary of overall financial situation Some funds available for 2005  But not enough to bridge to the new MOU We miss the contributions from Greece (40k) and USC (7k) We have adequate funds for vacuum and 4 He gas system Potential problem with timing of project money from PH  Magnet movement system - modifications may be delayed  CAST memo to D Schlatter PH under preparation 38% of requirements

Future outlook New MOU (K Zioutas)  Present estimates COLLABORATION 1215 kCHF –Phase II systems & manpower740 –General CAST hardware upgrades100 –Operating budget 375 CERN 1250 kCHF –Project money (mechanical modifications)100 –Exploitation350 –Magnet operation800 Villars ’04 – catalyst for longer term plans  H 2 running (cold gas cell in at least 1 beam pipe)  Double axion mass reach (0.8  1.5 eV/c 2 )  Development of gas cell(s) and Si detectors for cell windows (30ºK)

CAST – gas cell option 2006 PHASE II with 4 He 5K (0-166 mbar) Inside gas cell fitted with thin cold windows and external x-ray detectors (or solid Si-detector windows?) 2006 PHASE II data taking with 3 He 1.8K higher pressure ( mbar) Thin cold windows external x-ray detectors Start 2005 Design study for Phase II Gas system (2 options) Late 2005 PHASE II data taking with low pressure 4 He 1.8K (0-6 mbar) PHASE 1 ( vacuum ) Mid 2005 Install cold windows and simple gas system 2H2005 PHASE II Low pressure 4 He 1.8K tests with cold windows Start 2005 Modifications to magnet movement system and cable support arm 2008 onwards (?) PHASE III data taking with H 2 30K (0- 4 bar) inside gas cell fitted With solid Si-detector windows Mid 2005 Decision on option 2H2005 Ordering and construction