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Integration of IBS Detector with CAST Magnet: Cooling Power Analysis

Explore proposed schemes and cooling power requirements for IBS detector integration with the CAST magnet, ensuring safety and efficiency. Discuss vacuum vessel design, magnetic field shielding, and heat source dissipation.

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Integration of IBS Detector with CAST Magnet: Cooling Power Analysis

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  1. CAST-CAPP/IBS Detector Integration with the CAST Magnet Lino MiceliCAPP 2 Dec 2015

  2. Agenda • Introduction: Lino Miceli • Cavity cooling: • A scheme proposed by Prof. Hyoungsoon Choi • Discussion • Vacuum vessel requirements and design • Martyn Davenport: MRB 2K return pipe as a possible cooling source • Discussion • Outlook and planning

  3. Meeting introduction • Main topics from last meeting: • Requiring 1.8 K system temperature • New vessel (“present concept”) • Cavity cooling (including cables) • Cooling power requirements • Magnetic field shielding • Establish the need for circulators • A study to understand the consequences of a magnet quench and impact on cavity design.

  4. Cooling power requirements • Main heat sources: amplifiers (inside the new vacuum vessel) and piezo actuators (inside the cold bore) • Amplifiers: Low Noise Factory LNF-LNC4_8D • Assuming factory DC power specification: 0.50 V @ 80 mA = 4 mW • 14 cavities (filling one bore with 50 cm cavities) = 56 mW • We should be safe if we plan for 500 mW • Tuning piezo actuators: Janssen Precision Engineering CLA1801-HF • Dissipation spec: 0.25 mJ / step @ 4 K. Assumed 1 mJ and 5 nm / step at a speed of 20 steps / s the cooling power requirement would be 20 mW. • Moving 10 cavity simultaneously (no need to) the cooling power requirement inside the magnet is 200 mW

  5. Cooling power requirements (continued) • Antenna (coupler) piezo actuators: Janssen Precision Engineering CLA1801-HF • Assume similar figure as the tuning piezos Overall cooling power requirements for a magnet bore filled with 14, 50 cm long cavities • 0.5 W inside the amplifier vacuum vessel • 0.5 W inside the magnet bore Magnetic field shielding inside the vessel • Maximum field requirement: 100 gauss

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