DATA TAKING DURING 2004-2005

ILIAS WG1 Perugia September 19th, 2005

DATA TAKINGDATA TAKING DURING 2004-2005 DURING 2004-2005

EXPLORER NAUTILUS

3 ·10-193·10-19

• The longest scientific run of EXPLORER and NAUTILUS, more then 500 days

•These data (since May 2004) will be also used for IGEC2 analysis

No veto applied


30 4 9 140

0.002

0.004

0.006

0.008

0.01

Agosto

Te

ff (

K)

30 4 9 140

0.002

0.004

0.006

0.008

0.01

Agosto

Te

ff (

K)

EXPLORER NAUTILUS

EXPLORER AND NAUTILUSEXPLORER AND NAUTILUS DURING C6 DURING C6


CHANGES IN EXPLORER CHANGES IN EXPLORER

April 2005

Jan 2005


EXPLORER and NAUTILUS - 2005EXPLORER and NAUTILUS - 2005

NAUTILUS

EXPLORER

10-21 Hz-1/2

~ 50 Hz

@10-20 Hz-1/2


NEXT UPGRADENEXT UPGRADE

• NAUTILUS sensitivity is presently bounded by thermal noise. An improvement in sensitivity is expected if temperature is lowered from 3K to 100mK

• EXPLORER sensitivity is limited by electronic noise. A double SQUID amplifier is ready to be used in order to improve the apparatus sensitivity


Ct

Cd R

L1 L2

Lin

MA/2Mt

Thermal force acting on the Antenna

4KbT aMa/Qa

GW

Thermal force acting on the Transducer

4KbT tMt/Qt

Thermal noise voltage electrical circuit

4KbT elL/Qel

SQUID Noise

n

Coupled by electrical field

SOURCES OF NOISE SOURCES OF NOISE


Possible ImprovementsPossible Improvements EXPLORER EXPLORER

Teff~ 2mK

h ~ 3 10-19

Teff~ 200uK

h ~ 1 10-19


Possible Improvement NAUTILUSPossible Improvement NAUTILUS

Teff~ 2mK

h ~ 3 10-19

Teff~ 200uK

h ~ 1 10-19


NAUTILUS with a new amplifierNAUTILUS with a new amplifier

•SQUID amplifiers 100 times better than present ones are becoming available

•Implementing such a device on Nautilus cooled at 0.1 K would yield:

Teff<50 K

h ~ 5 10-20

DATA TAKING DURING 2004-2005

Documents

Transcript of DATA TAKING DURING 2004-2005