Instrumentation Fred Lewis 650 MHz High Beta CM

Instrumentation Fred Lewis 650 MHz High Beta CM Prototype FDR 29 – 31 July 2020 A Partnership of: US/DOE India/DAE Italy/INFN UK/UKRI-STFC France/CEA, CNRS/IN 2 P 3 Poland/WUST

Outline • • • 2 Introduction Instrumentation Engineering Specifications Instrumentation Solutions Instrumentation Assemblies Conclusions Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Introduction • Engineering specifications for the cryomodule instrumentation conform to the Electrical Safety requirements for lab equipment detailed in the Fermilab Environment, Safety and Health Manual (FESHM) Section 9000, in compliance with National Electrical Code (NEC). • Instrumentation solutions address specific criteria in order to meet the environmental conditions such as cryogenic/vacuum operations and lifetime radiation exposure. • The instrumentation implementation techniques and hardware choices are also based on years of development and support for superconducting accelerator devices that have been routinely tested or placed into service. 3 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Instrumentation Engineering Specifications • Engineering Specifications have been written for the cryomodule instrumentation wires, sensors, RF cables and connectors, and multi-pin connectors. – Written for LCLS-II and used as guidelines for PIPII SSR 1 CM – Currently in process of converting to general Fermilab documents • Address electrical, thermal, radiation, and cryo-mechanical performance requirements that must satisfy the operational / environmental conditions, Q 0 cavity performance requirements, and equipment & personnel electrical safety compliance. Document Number LCLSII-4. 5 -ES-0414 LCLSII-4. 5 -ES-0415 LCLSII-4. 5 -ES-0416 LCLSII-4. 5 -ES-0417 4 Jul 30, 2020 Document Cryomodule Coaxial Cable and Connectors Specification Cryomodule Sensors Specification Cryomodule Multi-Pin Connectors Specification Cryomodule Instrumentation Wiring Specification Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Engineering Specification Examples • Electrical, thermal, and cryo-mechanical performance requirements of RF cables – – – RF losses Operating frequency Impedance Shield effectiveness Dynamic Heat Load Static Bend radius • Radiation Hardness for sensors, wires, and cables – Radiation induced offsets (errors) in temperature sensor performance – Conductor electrical insulation degradation • Vacuum/Cryogenic – – 5 Ampacity of wires in a vacuum – MIL-STD-975 M specifies a 20% de-rating Outgassing of materials – choice of insulation, etc. Effect on radiation hardness of electrical insulation Thermal anchoring Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Engineering Specification Examples (cont’d) • Q 0 Cavity performance requirements – Magnetic measurement sensor specifications – Use of non-magnetic materials • Limit sources of magnetic fields • Wires, Cables, and Connector Specifications – Current/voltage/resistance specifications – Capacitive and inductive coupling • Shield electrical noise from sources such as the piezos, stepper motors, etc. • Equipment & Personnel Electrical Safety Compliance – Fermilab Environment, Safety and Health Manual (FESHM) Section 9000 • • 6 All external connectors containing hazardous voltages (50 volts or greater, AC or DC) must be touch safe (i. e. shall not present a contact hazard to the worker) – Applies to Feed-through connectors Capacitors must have bleeder resistors or automatic discharge devices – Applies to Piezo Actuators (can develop a charge during cool down) Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Instrumentation Solutions • The following are some example instrumentation solutions: • Piezo Tuner Wires 7 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Instrumentation Solutions • Piezo Capacitive Charge – A 1 MOhm bleeder resistor will be installed across each piezo inside the CM (follows electrical safety requirement) – Yuriy Pischalnikov confirmed approval by the piezo manufacturer • Temperature Sensor Selection – Lakeshore Cernox and Platinum RTDs meet all electrical, thermal, radiation, and cryogenic requirements 8 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Instrumentation Solutions • RF Coaxial Cables – Times Microwave Systems TFlex-401 & 402 were selected based on previous experience at Fermilab, and used on PIP-II SSR 1 CM. – The long-term radiation exposure of the PTFE was of particular concern. The engineering specification discusses the improved radiation hardness of this material when used in a vacuum environment and at lower (cryogenic) temperatures, and therefore the expected radiation hardness requirement is achieved. • Wire Insulation – All devices except the RTDs are instrumented with Accu-Glass wires, which have the same vacuum and radiation specifications as the wires use for the piezo actuators. – The temperature sensors are instrumented with a quad-twisted Manganin wire from California Fine Wire Co. This wire is insulated with a Polyamide ML (resin film). This insulation is reported (NASA) to show no deterioration for doses up to 1. 5 x 108 RADs. Tefzel is used as an outer jacket for these wire, which is very resistiant to abrasion. 9 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Instrumentation Solutions • Feed Through Connectors on Instrumentation Ports – All feed-through connectors chosen meet the electrical safety guidelines – Connectors are purposely chosen for their function and are not interchangeable • Temperature sensor cables are not compatible with stepper motor connectors, and so on. • O-Rings – EPDM O-Rings used will be used • Magnetic Materials – All connectors, wires, cables, etc. , are made of non-magnetic materials. – QC inspections will verify that purchased parts are non-magnetic. 10 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Instrumentation Assemblies • All instrumentation will have to be assembled prior to installation inside the cryomodule. • Individual components, such as temperature sensors, will have to be prepared for their specific application and terminated with wires/cables and required connectors. • Several QC checks will also be made during the assembly and installation process. 11 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Cernox and RTD sub-assemblies 12 Presenter | Presentation Title 3/5/2021

Cartridge and film heater sub assemblies and liquid level probe, and piezo actuator sub assemblies 13 Presenter | Presentation Title 3/5/2021

Instrumentation Procedures and Drawings • Detailed procedures and assembly drawings generated for PIP-II SSR 1 (~150 documents) are being updated for the HB 650 cryomodules. 14 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Summary • Four Cryomodule Instrumentation Engineering Specification documents have been generated that include the RF cables and connectors, multi-pin connectors, sensors, and instrumentation wires. • Instrumentation engineering specifications and solutions address electrical, thermal, radiation, and cryo-mechanical performance requirements that must satisfy the PIP-II CM operational / environmental conditions, as well as Q 0 cavity performance requirements, and laboratory equipment & personnel electrical safety requirements. • Most of the 150 existing procedures, drawings, and checkout documents generated for PIP-II SSR 1 are being updated for the HB 650 cryomodules. 15 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR

Questions 16 Jul 30, 2020 Fred Lewis | Instrumentation | 650 MHz HB CM Proto FDR