Abstract
An ERL-based EUV-FEL can provide EUV power of more than 1 kW for multiple scanners to overcome stochastic effects with a higher throughput. An IR-FEL project started at the KEK cERL as a NEDO project in order to develop high-power IR lasers for high-efficiency laser processing, and it can demonstrate proof of concept of the EUV-FEL for future lithography. The IR-FEL was constructed in May 2020 and commissioned in June to July 2020 and in February to March 2021. We will briefly review the EUV-FEL and present the construction and commissioning of the cERL IR-FEL for realizing the EUV-FEL for future lithography.
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