Abstract
TAMA300, a laser interferometric detector for gravitational waves, involves two vacuum ducts (300 m long, 400 mm in diameter) and eight vacuum chambers (2 m high, 1.2 m in diameter). The required vacuum pressure is 10-6 Pa or less, in order to avoid phase fluctuations in the scattering of the laser beam by the residual gases. Surface treatments, such as TiN coating and electrochemical buffing (ECB), were examined as an outgassing reduction method without baking. The outgassing rates measured for these ducts using a conductance-modulation method, were less than 1 × 10-8 Pa m3s-1m-2 after 50 h pumping. We adopted the ECB treatment on the entire surface of the ducts and chambers. The TAMA300 vacuum system was completed at the beginning of 1998. After 300 h of the initial pump-down procedure without baking, the pressure was of the order of 10-6 Pa, though the outgassing rate was higher than that in the test duct by a factor of over 10.
| Original language | English |
|---|---|
| Pages (from-to) | 353-356 |
| Number of pages | 4 |
| Journal | Vacuum |
| Volume | 53 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1999 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
Cite this
Vacuum system of the 300 m gravitational wave laser interferometer in Japan (TAMA300). / Saito, Y.; Ogawa, Y.; Horikoshi, G.; Matuda, N.; Takahashi, R.; Fukushima, Mitsuhiro.
In: Vacuum, Vol. 53, No. 1-2, 1999, p. 353-356.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Vacuum system of the 300 m gravitational wave laser interferometer in Japan (TAMA300)
AU - Saito, Y.
AU - Ogawa, Y.
AU - Horikoshi, G.
AU - Matuda, N.
AU - Takahashi, R.
AU - Fukushima, Mitsuhiro
PY - 1999
Y1 - 1999
N2 - TAMA300, a laser interferometric detector for gravitational waves, involves two vacuum ducts (300 m long, 400 mm in diameter) and eight vacuum chambers (2 m high, 1.2 m in diameter). The required vacuum pressure is 10-6 Pa or less, in order to avoid phase fluctuations in the scattering of the laser beam by the residual gases. Surface treatments, such as TiN coating and electrochemical buffing (ECB), were examined as an outgassing reduction method without baking. The outgassing rates measured for these ducts using a conductance-modulation method, were less than 1 × 10-8 Pa m3s-1m-2 after 50 h pumping. We adopted the ECB treatment on the entire surface of the ducts and chambers. The TAMA300 vacuum system was completed at the beginning of 1998. After 300 h of the initial pump-down procedure without baking, the pressure was of the order of 10-6 Pa, though the outgassing rate was higher than that in the test duct by a factor of over 10.
AB - TAMA300, a laser interferometric detector for gravitational waves, involves two vacuum ducts (300 m long, 400 mm in diameter) and eight vacuum chambers (2 m high, 1.2 m in diameter). The required vacuum pressure is 10-6 Pa or less, in order to avoid phase fluctuations in the scattering of the laser beam by the residual gases. Surface treatments, such as TiN coating and electrochemical buffing (ECB), were examined as an outgassing reduction method without baking. The outgassing rates measured for these ducts using a conductance-modulation method, were less than 1 × 10-8 Pa m3s-1m-2 after 50 h pumping. We adopted the ECB treatment on the entire surface of the ducts and chambers. The TAMA300 vacuum system was completed at the beginning of 1998. After 300 h of the initial pump-down procedure without baking, the pressure was of the order of 10-6 Pa, though the outgassing rate was higher than that in the test duct by a factor of over 10.
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UR - http://www.scopus.com/inward/citedby.url?scp=0033131681&partnerID=8YFLogxK
U2 - 10.1016/S0042-207X(98)00369-8
DO - 10.1016/S0042-207X(98)00369-8
M3 - Article
AN - SCOPUS:0033131681
VL - 53
SP - 353
EP - 356
JO - Vacuum
JF - Vacuum
SN - 0042-207X
IS - 1-2
ER -