Challenges for the low level RF design for ESS

Summary, in English

The European Spallation Source (ESS) is a planned neutron

source to be built in Lund, Sweden, which is planned

to produce the first neutrons in 2019. It will have an average

beam power at the target of 5 MW, an average current

along the linac of 50 mA, and a pulse repetition rate and

length of 20 Hz and 2.86 ms, respectively. The linac will

have around 200 LLRF stations employed to control a variety

of RF cavities such as RFQ, DTL, spoke and elliptical

superconducting cavities. The challenges on LLRF systems

are mainly the high demands on energy efficiency on

all parts of the facility, an operational goal of 95% availability

of the facility and a comparably short time from

start of final design to commissioning. Running with long

pulses, high current and spoke cavities also brings new

challenges on LLRF design. In this paper we will describe

the consequences these challenges have on the LLRF system,

and the proposed solutions and development projects

that have started in order to reach these demands.

• Author: Anders J Johansson; Rihua Zeng
• Department/s: Department of Electrical and Information Technology; European Spallation Source ESS AB
• Publishing year: 2011
• Language: English
• Pages: 460-461
• Document type: Conference paper
• Topic: Physical Sciences; Electrical Engineering, Electronic Engineering, Information Engineering
• Conference name: 2nd International Particle Accelerator Conference, 2011
• Conference date: 2011-09-04 - 2011-09-09
• Conference place: San Sebastían, Spain
• Status: Published
• Research group: Radio Systems