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辰巳大輔, 安東正樹, 粟家規親, 神田展行, 新冨孝和
低温レーザー干渉計CLIO(12) 寺田聡一, 内山 隆, 三代木伸二, 山元一広, 阿久津朋美, 黒田和明, 大橋正健, 奥富 聡, 徳成正雄, 鎌ヶ迫将悟, 中川憲保, 桐原裕之, 我妻一博, 山本明, 春山富義, 鈴木敏一, 佐藤伸明, 都丸隆行, 早河秀章, 新谷昌人, 高森昭光, 辰巳大輔, 安東正樹, 粟家規親, 神田展行, 新冨孝和
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CLIOのスケジュール 2006.2 CLIO Full Lock (低温) 2006.7 常温での感度向上実験 2006.11.20-21
データ取得テスト 常温での観測(1st. Observation) 低温での感度向上実験 2007.4 干渉計の低温化 低温での観測
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データ取得テスト 2006 Nov.20 14:35 – 16:10 (1.5 hour) 21 10:00 – 15:20 (5.5 hour) 目的 DAQ システムのテスト(大阪市大で開発→神岡移設) 冷凍機(コンプレッサー)の振動影響 CLIOのDAQシステム ホストコンピュータ:Linux OS ADC: DASmini 16bitアナログ 16ch デジタル 32bit 65kSPS DASmini LAN
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時刻同期 SK GPS 坑口 1PPS IRIG-B CLIO DASmini Sampling Frq. Digital Input
Local Osc. Cal. Sig.
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2. First test run for Data Taking
データ取得テスト 2. First test run for Data Taking First Data Taking Without alignment control Consecutive lock Nov hours Nov hours BOLFUR suspension wires No heat link Room temperature Configuration at the present Sensitivity at data taking Observable range (S/N=10) It (First Data Taking) was implemented on November 20 and 21 this year. We obtained succecive1.7 hours data and 5.3hours data respectively. The typical displacement noise during the data taking was shown as green line in this figure. (The green line was noise curve.) The right figure shows the observable range. For1.4 solar mass binaries, it is 36.6 kpc. When we took the data (on Nov.20) , the operation was implemented without alignment control (and consecutive lock). (The configuration of the interferometer at the present, is BOLFUR suspension wires instead of the sapphire fibers and operation with no heat link at room temperature.) 49kpc at best sensitivity Calculation by T.Uchiyama and K.Yamamoto Data taken on Nov was used in this work
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3. Contamination of cryocooler
データ取得テスト 3. Contamination of cryocooler Do cryocooler really have any influence for the data? Histogram for observable distance mean std Switch off kpc Switch on kpc For evaluating the fluctuation of observable range, we made a histogram. The horizontal axis is kpc. In fact, according to this histogram, It become clear the influence of the refrigerators operation. But, the optics including the photo-detectors and the beam guiding small optics will be installed in a vacuum tank in January 2007. Of course, we will put some housing over the refrigerators themselves. It is expected that the acoustic influence would be reduced. Cryocoolers have an affect on the data. PDs and its beam guiding optics will be installed in a vacuum tank in January 2007! Acoustic influence would be much reduced.
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1st Observation 2007/2/12 - 2/18 観測の準備
地球潮汐に伴う光路長変化(ドリフト)をUpper Massへフィードバックし、コイルアクチュエイターのダイナミックレンジを確保。 アンロック時に制御を切断。 (Auto Lock は無し) 観測で判ったこと 気象条件によっては、神岡の地下でも地面振動が大きくなり、 干渉計のロックが保てない(2/15 日本海側大荒れ)。
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常温での観測(1st. Observation)
2007 Feb.12 (Mon.) – Feb.18 (Sun.) 8: :00 Operator on Site 22:00 - 8:00 No-Operator Total 86 hour
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まとめ 2006年7月から、常温でのノイズハンティングを行い、 5×10-19 [m/rtHz] 2006年11月にテストラン、2007年2月に観測(1週間)を行った。 今後 鏡を冷やし、ノイズハンティングを行い、観測を行う。 干渉計のオペレートの自動化。 2007年3月25日「能登半島地震」の影響の復帰
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