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Dive into the research topics where Philipp Arnold is active.

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Featured researches published by Philipp Arnold.


Cryogenic Engineering Conference (CEC) / International Cryogenic Materials Conference (ICMC) | 2015

Spallation target cryogenic cooling design challenges at the European Spallation Source

John Jurns; J. Ringner; H. Quack; Philipp Arnold; John Weisend; Daniel Lyngh

The European Spallation Source (ESS) project is a neutron spallation source research facility currently being designed and built outside of Lund, Sweden. A linear accelerator delivers a 5 MW, 2.0 GeV, 62.5 mA proton beam to a spallation target to generate fast neutrons. Supercritical hydrogen circulates through two moderators surrounding the target, and transforms the fast neutrons emitted into slow neutrons, which are the final form of useful radiation. The supercritical hydrogen is in turn cooled from a helium cryogenic plant operating at 15-20 K. The supercritical cryogenic hydrogen circuit is a dynamic system, subject to significant changes in heat load. Proper pressure control of this system is critical to assure safe operation. The interaction between the hydrogen system and helium cryoplant poses unique challenges. This paper investigates the impact of the hydrogen system constraints on operation and control of the helium cryoplant, and suggests design options for the helium circuit.


Cryogenic Engineering Conference (CEC) / International Cryogenic Materials Conference (ICMC) | 2015

ESS Cryogenic System Process Design

Philipp Arnold; Wolfgang Hees; John Jurns; X. T. Su; Xilong Wang; John Weisend

The European Spallation Source (ESS) is a neutron-scattering facility funded and supported in collaboration with 17 European countries in Lund, Sweden. Cryogenic cooling at ESS is vital particularly for the linear accelerator, the hydrogen target moderators, a test stand for cryomodules, the neutron instruments and their sample environments. The paper will focus on specific process design criteria, design decisions and their motivations for the helium cryoplants and auxiliary equipment. Key issues for all plants and their process concepts are energy efficiency, reliability, smooth turn-down behaviour and flexibility. The accelerator cryoplant (ACCP) and the target moderator cryoplant (TMCP) in particular need to be prepared for a range of refrigeration capacities due to the intrinsic uncertainties regarding heat load definitions. Furthermore the paper addresses questions regarding process arrangement, 2 K cooling methodology, LN2 precooling, helium storage, helium purification and heat recovery.


Cryogenic Engineering Conference (CEC) / International Cryogenic Materials Conference (ICMC) | 2015

ESS Accelerator Cryoplant Process Design

Xilong Wang; Philipp Arnold; Wolfgang Hees; J. Hildenbeutel; John Weisend

The European Spallation Source (ESS) is a neutron-scattering facility being built with extensive international collaboration in Lund, Sweden. The ESS accelerator will deliver protons with 5 MW of power to the target at 2.0 GeV, with a nominal current of 62.5 mA. The superconducting part of the accelerator is about 300 meters long and contains 43 cryomodules. The ESS accelerator cryoplant (ACCP) will provide the cooling for the cryomodules and the cryogenic distribution system that delivers the helium to the cryomodules. The ACCP will cover three cryogenic circuits: Bath cooling for the cavities at 2 K, the thermal shields at around 40 K and the power couplers thermalisation with 4.5 K forced helium cooling. The open competitive bid for the ACCP took place in 2014 with Linde Kryotechnik AG being selected as the vendor. This paper summarizes the progress in the ACCP development and engineering. Current status including final cooling requirements, preliminary process design, system configuration, machine concept and layout, main parameters and features, solution for the acceptance tests, exergy analysis and efficiency is presented.


Physics Procedia | 2015

Cryogenic Distribution System for the ESS Superconducting Proton Linac

Jaroslaw Fydrych; Philipp Arnold; Wolfgang Hees; P. Tereszkowski; Xilong Wang; John Weisend


Physics Procedia | 2015

Cryogenics at the European Spallation Source

John Weisend; Philipp Arnold; J. Fydrych. W. Hees; John Jurns; Xilong Wang


Physics Procedia | 2015

The ESS Cryomodule Test Stand

Wolfgang Hees; Philipp Arnold; Jaroslaw Fydrych; H. Spoelstra; Xilong Wang; John Weisend


Physics Procedia | 2015

Cryogenic Cooling of the Cold Neutron Source at ESS

John Jurns; Philipp Arnold; John Weisend; R. Linander


5th Int. Particle Accelerator Conf. (IPAC'14), Dresden, Germany, June 15-20, 2014 | 2014

The ESS Cryogenic System

Philipp Arnold; Jaroslaw Fydrych; Wolfgang Hees; John Jurns; Xilong Wang; John Weisend


Archive | 2014

Specialized Technical Services at ESS

John Weisend; Frithiof Jensen; Georg Hulla; Jaroslaw Fydrych; Philipp Arnold; Xilong Wang; Wolfgang Hees; Hilko Spoelstra; John Jurns; Giobatta Lanfranco; Peter Ladd


Physics Procedia | 2015

Specification of the ESS Accelerator Cryoplant

Xilong Wang; Philipp Arnold; Jaroslaw Fydrych; Wolfgang Hees; John Jurns; Daniel Piso; John Weisend

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John Weisend

European Spallation Source

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Xilong Wang

European Spallation Source

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John Jurns

European Spallation Source

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Wolfgang Hees

European Spallation Source

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Jaroslaw Fydrych

European Spallation Source

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Daniel Lyngh

European Spallation Source

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Daniel Piso

European Spallation Source

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Frithiof Jensen

European Spallation Source

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H. Spoelstra

European Spallation Source

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