1. Preventivi 2013 Advanced VIRGO Group Pisa
Sezione INFN Pisa – July 2, 2012

2. Advanced VIRGO Project Pisa Group Activity
Outline
Advanced VIRGO Project
Pisa Group Activity
Support from INFN Pisa branch
Financial Requests
2 July 2012
F. Frasconi - INFN Pisa

3. End of VIRGO ITF
The scientific activity of the first generation ITF finished at the end of 2011:
- VSR4 concluded in September.
November 2011: External Injection Bench (EIB-SAS) first installation for AdV within the Laser laboratory:
- based on new technology for VIRGO;
- pre-commissioning using the ITF.
Site preparation activity started in December.
2 July 2012
F. Frasconi - INFN Pisa

4. VIRGO+MS Sensitivity
2 July 2012
F. Frasconi - INFN Pisa

5. Toward AdV
Goals:
Sensitivity improved by 10 (optimized for BNS 134 Mpc)
Start the data taking with Advanced LIGO (2015)
2 July 2012
F. Frasconi - INFN Pisa

6. Advanced VIRGO Project
The interferometer up-grade is based on Marginally Stable Recycling Cavity (MSRC)
TDR finished in April 2012
2 July 2012
F. Frasconi - INFN Pisa

7. MSRC for AdV
After a long scientific and technical discussion within the Collaboration, the MSRC optical scheme has been chosen for the following reasons:
- more experience with this configuration;
- based on the same suspension system;
- no mirror with small RoC (avoiding alignment and positioning difficulties);
- minor time schedule problem (re-start in 2015);
- fits in the same infrastructure (minor changes);
- less expensive.
2 July 2012
F. Frasconi - INFN Pisa

8. Group Activity: commissioning & VIRGO+MS
During the commissioning phases the group has been deeply involved in the following tasks:
- ITF locking
- ITF alignment
- mirror suspension control
- superattenuator maintenance and interfaces
- control electronics for suspensions
- phase camera
- vacuum system upgrades
- noise study of the ITF
2 July 2012
F. Frasconi - INFN Pisa

9. Data Analysis: stochastic background
Search for gravitational waves that can be modeled only as a stochastic process.
Joint use of VIRGO & LIGO data is mandatory in this case (correlation).
Cosmological backgrounds
- Upper limits for early universe evolution models
- Detection, study of anisotropies
- This is the main field of activity. Interesting upper limits available. LSC/VIRGO collaboration. An upper limit on the stochastic gravitational-wave background of cosmological origin.
Nature 460, (20 August 2009)
- LIGO/VIRGO joint analysis published LSC/VIRGO collaboration. An upper limit on a stochastic gravitational wave background using LIGO and Virgo interferometers at Hz. Phys. Rev. D85, (2012)
Astrophysical backgrounds
- Star formation history
- Population statistic
Resp. Giancarlo Cella
Pisa group:
- Contributions to S5/VSR1 LIGO/VIRGO analysis
- Porting of LIGO data analysis pipeline on GRID (in progress)
- Analysis on GRID (VIRGO pipeline)
- Software & hardware injections
- Analysis of S6/VSR2 data (under review)
- Study of constraints on extended gravitation theories (in progress)
- Study of backgrounds from cosmic strings populations (specialistic Thesis about that just started)
Future (next year):
- First production release of data analysis pipeline for extended gravitation theories (fall of this year). Application to S6/VSR2 data.
2 July 2012
F. Frasconi - INFN Pisa

10. Data Analysis: continuous waves
Pisa group:
- Implementation and application of a Doppler demodulation algorithm. Tested on the Pisa GRID farm
Computationally efficient
Well suited for semi-targeted search S. Braccini, G. Cella, I. Ferrante, D. Passuello, O. Torre. Resampling technique to correct for the Doppler effect in a search for gravitational waves.
Phys. Rev. D83, (2011)
- Semitargeted search to the RX J supernova remnant (in progress, one dedicated Ph.D. candidate)
Future (next year):
- Finalization of RX J
- Starting project (with FERMI-LAT): unveiling the physics of compact objects with joint observations of GW and electromagnetic radiation. FIRB under evaluation
Search for monochromatic gravitational waves.
Not really monochromatic:
- Doppler shift induced by detector’s motion
- Spin down (or spin up)
Several strategies:
- Blind search (heavy computational effort, not pursued in Pisa)
- Semi-targeted search (source position known, frequency unknown)
- Targeted search (source position and frequency known)
2 July 2012
F. Frasconi - INFN Pisa

11. Activity for AdV and beyond
Important changes have been introduced in the AdV project with respect to the baseline  impact on SA
Scattered light mitigation:
- use of large baffles;
- all science-mode photodiodes in vacuum and seismically isolated.
Laser: from solid state to rod technology.
More complex Thermal Compensation System.
Payloads: new mechanical design, no recoil mass, actuation cage connected to F7.
2 July 2012
F. Frasconi - INFN Pisa

12. Superattenuators for AdV
With MSRC optical scheme for AdV the Group activity is focused on:
- F7 re-design (5 filters + monitoring systems) due to the new geometry of the payloads;
- SA up-grades for tilt control (6 new IP and 18 PZT actuators);
- new SA for SR mirror (a complete suspension: IP + 6 filters);
- seismic isolation to be improved on short SA with an additional mechanical filter (3 filters);
- control electronics to be re-built (̴ 250 boards);
- design of the new SIB (mechanics).
2 July 2012
F. Frasconi - INFN Pisa

13. Complementary activity: SAFE
The SAFE Project is based on the upgrades devoted to improve the feed-back control performance of the SA;
A long VIRGO SA (with minor differences) to be used as a test bench has been assembled (filters not yet installed) on EGO site with:
- more rigid pre-isolator stage (new IP with monolithic legs)
- new Top Stage platform (no spurious resonances)
- 3 PZT actuators (under the IP feet) for tilt control and vertical ID improvements;
Facility to be used during AdV Commissioning.
2 July 2012
F. Frasconi - INFN Pisa

14. ISAV
Isolatori Sismici per Advanced VIRGO programma di formazione per giovani laureati della Regione Toscana & Comunita’ Europea (POR CREO FSE )
3 “Borse per innovazione e trasferimento tecnologico alle imprese con finanziamento della Regione Toscana”
Partnership con: Scienzia Machinale S.r.l.
Conclusione attivita’: 31 Ottobre 2013
2 July 2012
F. Frasconi - INFN Pisa

15. Working in progress: AdV Short SA
Seismic isolation improvement adding a Seismic Filter on MC, INJ and DET suspensions
2 July 2012
F. Frasconi - INFN Pisa

16. Activity on Seismic Filters
Assembling and tuning of seismic filters for short SA in cleaning room: MC and SAFE.
Special thanks to A. Basti & G. Balestri.
2 July 2012
F. Frasconi - INFN Pisa

17. Working in progress: AdV Long SA
Re-design and prototype of F7 in accordance with the new payloads geometry
F7 and Payload prototypes for BS is progressing
2 July 2012
F. Frasconi - INFN Pisa

18. Support from INFN Pisa branch
Fully involved: F. Frasconi, R. Passaquieti, D. Passuello, A. Gennai, M. Bitossi, M. Mantovani, G. Vajente;
Partially involved: F. Fidecaro, C. Bradaschia, A. Giazotto, A. Di Virgilio (?), ……
Desiderata :
- mechanics: A Basti (0.7), G. Balestri (0.8) + tec. Alt. Tec. (filter assembling team & SAFE);
- electronics: C. Magazzu’ (1) + Electronic Engineer
Electronic Engineer (A. Kutynia) is coming (from Warsaw University, July ) for 1 year
Space available in cleaning room (thanks to F. Bosi) and VIRGO lab (considered appropriate to the needs)
2 July 2012
F. Frasconi - INFN Pisa

19. Group Composition ̴ 16 FTE Name FTE Author Student Activity
Allocca Annalisa
100%
Yes
Interferometer Sensitivity and Control
Basti Andrea
70% No
SA Mechanics
Bitossi Massimiliano
SA Electronics
Bradaschia Carlo
40%
Outreach coordinator, Vacuum syst. AdV, AdVSA
Cella Giancarlo
DA, Stochastic background coordinator
Di Lieto Alberto
R&D on silicon fibres, Optics
Di Virgilio Angela
30%
Gyrolaser, DA on Noise studies
Ferrante Isidoro
Data analysis and Noise studies
Fidecaro Francesco
Noise Studies, AdV SA
Frasconi Franco
AdV SA , R&D on Suspensions ,Cryogenics
Gennai Alberto
AdV Control Electronics
Giazotto Adalberto
Future itfs, VIR-LIGO Liason, Tiltmeters, AdV SA
Mantovani Maddalena
Alignment, Injection System
Passaquieti Roberto
AdV SA
Passuello Diego
Paoletti Federico *
AdV Electronics
Paoletti Riccardo
???
Poggiani Rosa
R&D on Cryogenic, DA on Pulsar
Toncelli Alessandra
R&D on Silicon fibres, Optics
Tonelli Mauro
Torre Oriella
Data Analysis (Pulsar)
Vajente Gabriele
2 July 2012
̴ 16 FTE
F. Frasconi - INFN Pisa

20. Financial Request (very preliminary)
Missioni Interne: 69 kEuro (2012: kEuro su 95 kEuro richiesti);
Missioni Estere: 34 keuro (2012: 23+6 kEuro su 43 kEuro richiesti);
Consumi: 18 kEuro (2012: 14 kEuro su 24 kEuro richiesti)
8 kEuro electronic lab maintenance
5 kEuro SAFE maintenance
3 kEuro cryogenic lab maintenance
2 kEuro suspension lab
Inventario: 1.5 kEuro PC per strumentazione (2012: -- kEuro su 2 kEuro richiesti)
2 July 2012
F. Frasconi - INFN Pisa

21. Financial Request (very preliminary) (cont.)
Costruzione apparati: 21 kEuro (2012: 25 kEuro su 30 kEuro richiesti)
8 kEuro roots pump for SAFE
5 kEuro new positioning sensors for SAFE
8 kEuro new accelerometer prototype for SAFE
TOTALE: kEuro (2012: kEuro su 194 kEuro richiesti)
2 July 2012
F. Frasconi - INFN Pisa

22. Final Consideratons
AdV Project based on MSRC started. Different changes with respect to the baseline project have been introduced with important impact on the SA:
re-design F7, re-tuning of all seismic filters, new control strategy
to be compliant with the new payload geometry;
Up-grade process on short SA in progress;
Difficulty to be in time with the project schedule (ITF ready in 2015) and electronic production as weak point;
INFN Group to be re-organized (stabilized people need);
Financial request centered on SAFE (to be used also in PRIN on squeezed light under evaluation – 99/100).
2 July 2012
F. Frasconi - INFN Pisa