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Overview of SwissFEL dual-photocathode laser capabilities and perspectives for exotic FEL modes

High Power Laser Science and Engineering 2021年第4期9卷 46-65页

作者： S.Bettoni A.Cavalieri A.Dax E.Divall C.P.Hauri S.Hunziker M.Huppert M.Kaiser M.Paraliev C.Sydlo C.Vicario A.Trisorio Paul Scherrer Institut 5232 VilligenSwitzerland University of Bern 3012 BernSwitzerland TRUMPF Switzerland 7214 GruschSwitzerland huber+suhner ag 9100 HerisauSwitzerland

SwissFEL is a compact,high-brilliance,soft and hard X-ray free electron laser(FEL)facility that started user operation in *** facility is composed of two parallel beam lines seeded by a common linear accelerator(LINAC),and a two-bunch *** the injector,an innovative dual-photocathode laser scheme has been developed based on state-of-the-art ytterbium femtosecond laser *** this paper,we describe the performance of the Swiss FEL photocathode drive lasers(PCDLs),the pulse-shaping capabilities as well as the versatility of the systems,which allow many different modes of operation of Swiss *** full control over the Swiss FEL electron bunch properties via the unique architecture of the PCDLs will enable in the future the advent of more-advanced FEL modes;these modes include,but are not restricted to,the generation of single or trains of sub-femtosecond FEL pulses,multi-color FEL and finally,the generation of fully coherent X-ray pulses via laser-based seeding.

关键词： free electron laser femtosecond laser laser shaping photocathode lasers

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Treatment of Retained Fetal Membranes: Comparison of the Postpartum Period after Routine Treatment or Routine Treatment Including an Additional Phytotherapeutic Substance in Dairy Cattle in Switzerland

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Open Journal of Veterinary Medicine 2015年第4期5卷 93-99页

作者： Benjamin Biner Men Bischoff Franziska Klarer Fritz suhner Jürg Hüsler Gaby Hirsbrunner Clinica Alpina Scuol Switzerland Clinic for Ruminants Vetsuisse Faculty University of Berne Berne Switzerland Unit of Phytopharmacy Institute of Biotechnology Zürich University of Applied Sciences W&auml denswil Switzerland Rena Handels ag Hindelbank Switzerland Institute of Mathematical Statistics and Actuarial Science University of Berne Berne Switzerland

Background: The therapy of retained fetal membranes (RFM) is a controversial subject. In Switzerland, intrauterine antibiotics are routinely administered although their effect on fertility parameters is questionable. The objective of this study was to compare the post-partal period after a routine treatment of RFM in 2 groups: one group received a placebo additionally (A), whereas the other group received a phytotherapeutic substance (lime bark) (B) additionally. The routine treatment of RFM included an attempt to manually remove the fetal membranes (for a maximum of 5 min), intramuscular administration of oxytetracycline and intrauterine treatment with tetracycline. In case of an elevated rectal temperature (>39.0°C), an additional non-steroidal inflam-matory drug was allowed. Methods: Cows undergoing caesarean section, suffering from prolapse of the uterus, deep cervical or vaginal injuries, hypocalcaemia, and illnesses during the last 14 days before calving were excluded. Cows had to be more than 265 days pregnant. Only cows that were artificially inseminated after RFM were included. Group stratification was done according to the last number on the ear tag (even/uneven) with (n = 50) cows in group A and (n = 55) cows in group B. Results: The number of treatments after the initial treatment of RFM was not significantly different between groups. The median interval from calving to the first insemination was 77 days in group A compared to 82 days in group B (p = 0.72). The number of AI’s until conception was not significantly different between groups. The median number of days open was 89 days in group A compared to 96 days in group B (p = 0.57). The culling rate was not significantly different between groups. Conclusion: There was neither a difference between the groups concerning therapies within the first 50 days after RFM nor concerning the subsequent fertility variables.

关键词： Cattle Retained Fetal Membranes Phytotherapy Fertility

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