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Fast Extraction from the Booster to R Line using Two Kicks from the F3 Kicker
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Optical absorption of ion-beam sputtered amorphous silicon coatings
Low mechanical loss at low temperatures and a high index of refraction should make silicon
optimally suited for thermal noise reduction in highly reflective mirror coatings for gravitational wave
detectors. However, due to high optical absorption, amorphous silicon (aSi) is unsuitable for being used
as a direct high-index coating material to replace tantala. A possible solution is a multimaterial design,
which enables exploitation of the excellent mechanical properties of aSi in the lower coating layers. The
possible number of aSi layers increases with absorption reduction. In this work, the optimum heat
treatment temperature of aSi deposited via ion-beam sputtering was investigated and found to be 450 °C.
For this temperature, the absorption after deposition of a single layer of aSi at 1064 nm and 1550 nm
was reduced by more than 80%
Entwicklung und Optimierung eines Mikroentgasers für die HPLC unter dem Aspekt der industriellen Herstellbarkeit
Effects of Booster Scraping in Polarized Proton Runs 2006 and 2008
Effects of the Booster vertical scraping on the RHIC beam polarization, the RHIC beam emittance, and on the Booster to AGS transfer efficiency and AGS transmission as well, are further studied. In [1], the strong dependence of the RHIC beam polarization and emittance on bunch intensity in proton run 2008 (pp08) is compared with the proton run 2006 (pp06), where the dependence is much weaker. The setting in the AGS Booster, mainly the vertical scraping, is suspected to having played a role in the different patterns in the two runs. In this note, we further study the effects of the Booster vertical scraping on the RHIC beam polarization, and on the RHIC beam emittance as well. With the improvement of the RHIC bunch intensity in mind, the Booster scraping effects on the Booster to AGS transfer (BtA) efficiency and the AGS transmission are also studied. For simplicity and to be more useful, only the RHIC fills after the one-week shutdown in pp06 and the fills using the AGS User 2 in pp08 are shown. For these fills, the machine settings in AGS are similar in pp06 and pp08 runs. Furthermore, this setting might be used for next polarized proton run, at least at the beginning of the run
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