Damping coefficients were also measured at each resonant frequency, whose results are consistent with expectations.
Vibration-properties of two "identical" arms, which have been constructed with same
structure and support-mechanism, were measured with two "identical" oscillators.
The two FFT results were different especially at high frequencies.
Very careful assemble ( bolting etc. ) must be required.
(2) Magnet configurations for background estimations by GEANT
Although K.Kubo showed a list of magnet properties (location, length, field strength)
at the dump line as follows, the apertures must be provided for designs of magnets. Also, beam
profiles at the magnets are needed for the designs. He will prepare the distributions at
all magnets. The dump line design should be based on superconducting final focus magnets
for the most severe backgrounds expected. The magnet configuration of final focus system
will be provided by N. Yamamoto.
Magnet parameters in present (tentative) dump line design. (K.Kubo, 2002.03.28) Quad Name S(m) Length(m) B'(T/m) QF1 0.1285D+02 0.3000D+01 0.1317D+02 QD1 0.1625D+02 0.3000D+01 0.1207D+02 QD2 0.6145D+02 0.3000D+01 0.4907D+02 QF2 0.6485D+02 0.3000D+01 -0.6700D+02 Bend Name S(m) Length(m) B(T) BH1 0.2125D+02 0.5000D+01 0.1039D+01 BH2 0.5625D+02 0.2000D+01 -0.1660D+01 BV1 0.6805D+02 0.3000D+01 0.8970D+00 BV2 0.7425D+02 0.3000D+01 -0.8969D+00 BV3 0.8875D+02 0.5000D+01 0.1001D+01 BH3 0.1038D+03 0.5000D+02 -0.8342D+00 S(m): Distance from IP to the entrance of each magnet.
The next meeting will be on 11 April (Thu.), 2001 13:30 - 15:00 at 3 gokan, 425.