Increasing the bandwidth of resonant gravitational antennas: the case of explorer.
Resonant gravitational wave detectors with an observation bandwidth of tens of hertz are a reality: the antenna Explorer, operated at CERN by the ROG Collaboration, has been upgraded with a new readout. In this new configuration, it exhibits an unprecedented useful bandwidth: in over 55 Hz about its center operating frequency of 919 Hz the spectral sensitivity is better than 10(-20) Hz(-1/2). We describe the detector and its sensitivity and discuss the foreseeable upgrades to even larger bandwidths.
Astone
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P
Istituto Nazionale di Fisica Nucleare (INFN), Roma, Italy.
Babusci
D
D
Bassan
M
M
Carelli
P
P
Cavallari
G
G
Coccia
E
E
Cosmelli
C
C
D'Antonio
S
S
Fafone
V
V
Fauth
A C
AC
Federici
G
G
Giordano
G
G
Marini
A
A
Minenkov
Y
Y
Modena
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I
Modestino
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G
Moleti
A
A
Pallottino
G V
GV
Pizzella
G
G
Quintieri
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L
Rocchi
A
A
Ronga
F
F
Terenzi
R
R
Torrioli
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G
Visco
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M