Publications by authors named "E E Simakov"

The pursuit to operate photocathodes at high accelerating gradients to increase brightness of electron beams is gaining interests within the accelerator community, particularly for applications such as free electron lasers (FEL) and compact accelerators. Cesium telluride (CsTe) is a widely used photocathode material and it is presumed to offer resilience to higher gradients because of its wider band gap compared to other semiconductors. Despite its advantages, crucial material properties of CsTe remain largely unknown both in theory and experiments.

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The use of infrared lasers to power accelerating dielectric structures is a developing area of research. Within this technology, the choice of the dielectric material forming the accelerating structures, such as the photonic band gap (PBG) structures, is dictated by a range of interrelated factors including their dielectric and optical properties, amenability to photo-polymerization, thermochemical stability and other target performance metrics of the particle accelerator. In this direction, electronic structure theory aided computational screening and design of dielectric materials can play a key role in identifying potential candidate materials with the targeted functionalities to guide experimental synthetic efforts.

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We report experimental observation of higher order mode (HOM) wakefield suppression in a room-temperature traveling-wave photonic-band-gap (PBG) accelerating structure at 11.700 GHz. It has been long recognized that PBG structures have the potential for reducing long-range wakefields in accelerators.

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We compared parameters of the state of myocardium after coronary artery bypass surgery (CABS) performed according to the following techniques - with complete cardiopulmonary bypass (CABS-CBP), beating heart bypass grafting with parallel normothermic perfusion (CABS-BH-NP), and beating heart bypass grafting (CABS-BH). Patients (n=100, 86% men, 14% women, age 56-69 years) were divided into 3 groups with comparable sex, age, state of the myocardium, and EUROSCORE surgical risk. In group 1 patients (n=35) we used CABS-CHB, in group 2 (n=32) - CABS-BH-NP, in group 3 (n=33) - CABS-BH.

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We compared parameters of the state of myocardium after coronary artery bypass surgery (CABS) performed according to the following techniques--with complete cardiopulmonary bypass (CABS-CBP), beating heart bypass grafting with parallel normothermic perfusion (CABS- BH-NP), and beating heart bypass grafting (CABS-BH). Patients (n = 100, 86% men, 14% women, age 56-69 years) were divided into 3 groups with comparable sex, age, state of the myocardium, and EUROSCORE surgical risk. In group 1 patients (n = 35) we used CABS-CHB, in group 2 (n = 32)--CABS-BH-NP, in group 3 (n = 33)--CABS-BH.

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