History
Sensitivity was improved at the all frequency range. (08/09/18)
The best sensitivity on 4 Nov., 2003 was improved at the all freequency range due to the SAS.
Recycled FPMI with 4 SASs was successfully locked (07/06)
The recycled FPMI with 4 SASs was successfully locked.
Interferometer with 4 SASs was successfully locked (07/03)
The interferometer (Locked-FP) with 4 SASs was successfully locked.
Installation of the last SAS was finished (06/11)
The fourth SAS was installed to NM2.
300m cavity with SASs was successfully locked (06/08)
The 300m cavity, which consists of 2 SASs, was successfully locked.
300m cavity was successfully locked in the first time after the installation of SAS (06/03)
The 300m cavity, which consists of a SAS and a former suspension, was successfully locked in the first time.
Installation of SAS started (05/09/01)
Installation of Seismic Attenuation System (SAS) started in the west end room.
Recycled Michelson Experiments were finished (04/12/10)
Experiments using the Michelson interferometer were finished.
Recycled Michelson Experiments started (04/1/23)
In order to investigate the noise behavior, the optical configuration was changed to the Michelson interferometer without 300m arms.
Data Taking 9+ was finished (04/1/10)
Data Taking 9 was extended by an extra week. Total 557 hours data was taken. Details are here.
Data Taking 9 was finished (04/1/4)
Total 480 hours data was taken. The observation is continued using full automation system. Details are here.
Sensitivity of Recycled FPMI was improved (03/11/4)
Best sensitivity is 5 x 10-19 m/sqrt(Hz).
Sensitivity of Recycled FPMI was improved (03/7/12)
Best sensitivity is 8 x 10-19 m/sqrt(Hz). Details are here.
Data Taking 8 was finished (03/4/14)
Total 1158 hours data was taken. Duty cycle was 81.3%.
1000 hours data (03/4/6)
Total observation time of 1000 hours were achieved in Data Taking 8.
Data Taking 8 started (03/2/14)
Data Taking 8 started at 14:22, 14 February (UTC). This observation will be finished on 14 April. Details are here.
LIGO-TAMA accord in Kyoto (02/12/18)
An attachment to the LIGO-TAMA Memorandum of Understanding (MOU) was signed in Kyoto toward the coincidence run with LIGO. LIGO S2 and TAMA DT8 will be held in 14 February - 14 April in 2003.
Data Taking 7 was finished (02/8/31-02/9/2)
Total 24.6 hours data was taken. The best sensitivity was also updated during the run (1.0 x 10-18 m/sqrt(Hz)). Details are here.
Data Taking 7 will start soon (02/8/28)
Data Taking 7 will be held in 31 Aug. - 2 Sep. Details are here.
Sensitivity of Recycled FPMI was improved (02/8/5)
Best sensitivity is 1.2 x 10-18 m/sqrt(Hz). Details are here.
Test Run 3 was finished (02/7/6-02/7/8)
Since Data Taking 7 was postponded, the observation was assigned as Test Run 3.
Test Run 2 was finished (02/5/9-02/5/10)
The long term operation of the recycled TAMA300 was demonstrated for the next observation run (Data Taking 7).
Control of power recycling succeeded (01/12/25)
Full lock of power recycled TAMA300 has been achieved.
Joint research using TAMA data (01/12/12)
Now scientists who are interested in gravitational-wave astronomy are wellcome to join us. Details are here.
Data Taking 6 was finished (01/9/20)
Total 1038 hours data was taken. Duty cycle was 86.5%. Details are here.
1000 hours data (01/9/18)
Total observation time of 1000 hours were achieved in Data Taking 6.
500 hours data (01/8/25)
Total observation time of 500 hours were achieved in Data Taking 6.
Data Taking 6 started (01/8/1)
This observation will be finished at 20 Sep.
Test Run 1 was finished (01/6/4-01/6/6)
The longest time of continuous locking was updated to 24.8 hours.
Sensitivity of FPMI was improved (01/6/2)
Sensitivity was improved by a factor of about 10 around 100Hz. Noise spectrum is here.
Data Taking 5 was finished (01/3/2-01/3/8)
Total 111 hour data was taken. Duty cycle is 76.7% in the full-time observation.
Data Taking 4 was finished (00/9/4)
Total 160 hour data was taken. The longest time of continuous locking is 12.8 hours. Details are here.
100 hours data (00/8/30)
Total observation time of 100 hours were achieved in Data Taking 4.
Data Taking 4 started (00/8/21)
This observation will be finished at 4 Sep.
Sensitivity of FPMI was improved (00/8/14)
Best sensitivity is 1.5 x 10-18 m/sqrt(Hz). This corresponds to strain sensitivity of 5 x 10-21 /sqrt(Hz) (World record). Noise spectrum is here.
Sensitivity of FPMI was improved (00/7/17)
Best sensitivity is 2.5 x 10-18 m/sqrt(Hz).
Data Taking 3 was finished (00/4/20-23)
Over 13 hour data was taken. The sensitivity was kept in almost 4 x 10-18 m/sqrt(Hz).
Sensitivity of FPMI was improved (00/3/16)
Sensitivity around 300Hz was improved about 2-3 times more than that in March 10.
Sensitivity of FPMI was improved (00/3/10)
Best sensitivity is 4 x 10-18 m/sqrt(Hz). Especially single-digit improvement was obtained around 300Hz.
Sensitivity of FPMI was improved (99/12/1)
Best sensitivity is 5 x 10-18 m/sqrt(Hz).
Online Viewgraph (99/10/27)
Some viewgraphs of the talks in the 2nd TAMA Workshop are available from the program page.
Sensitivity of FPMI was improved (99/10/16)
Best sensitivity is 7 x 10-18 m/sqrt(Hz) @700-900Hz. Improvement factor is about 2 at >10Hz.
Data Taking 2 was successfully finished (99/9/17-20)
Total 31 hour data was taken (duty cycle 94%). Typical sensitivity is 1 x 10-17 m/sqrt(Hz).
Sensitivity of FPMI was improved (99/9/10)
Best sensitivity is 8 x 10-18 m/sqrt(Hz).
Sensitivity of FPMI was improved (99/9/7)
Best sensitivity is 2 x 10-17 m/sqrt(Hz).
Sensitivity of FPMI was improved (99/8/11)
Best sensitivity is 4 x 10-17 m/sqrt(Hz).
Data Taking 1 was successfully finished (99/8/6-7)
FPMI was continuously locked for 7 hours.
Operation of FPMI with 10W Laser succeeded (99/5/22)
FPMI was locked using 10W Laser and 10m Mode Cleaner as light source.
Operation of FPMI succeeded (98/9/18)
FPMI was locked using pre-modulation method.
Absolute Length measurement was successfully finished (98/3/18-23)
Absolute length of 300m cavity was measured with resolution of 1mm. Local ground strain variations of 6 x 10-8 were observed.
300m cavity was successfully locked (97/11/29)
By using a wave front sensing method, the cavity was very stable.
300m cavity was resonated (97/10/30)
We found the first resonance of 300m cavity after initial alignment.