Broadband impedance of the NESTOR storage ring

• Дата: 2011
• Автори: Androsov, V.P., Gladkikh, P.I., Gvozd, A.M., Karnaukhov, I.M., Telegin, Yu.N.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2011
• Назва видання: Вопросы атомной науки и техники
• Теми: Теория и техника ускорения частиц
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/111247
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Broadband impedance of the NESTOR storage ring / V.P. Androsov, P.I. Gladkikh, A.M. Gvozd, I.M. Karnaukhov, Yu.N. Telegin // Вопросы атомной науки и техники. — 2011. — № 3. — С. 60-67. — Бібліогр.: 21 назв. — англ.

The contributions from lossy and inductive vacuum chamber components to the broadband impedance of the NESTOR storage ring are obtained by using both low-frequency analytical approaches and computer simulations. As was expected considering the small ring circumference (15.44m), the main contributions both to the longitudinal impedance Z||/n and the loss factor kloss come from the RF-cavity. Cavity impedance was also estimated with CST Microwave Studio (CST Studio SuiteTM 2006) by simulating coaxial wire method commonly used for impedance measurements. Both estimates agree well. Finally, we performed the simulations of a number of inductive elements with CST Particle Studio 2010 by using wake field solver. We have also evaluated the bunch length in NESTOR taking the conservative estimate of 3 Ohm for the ring broadband impedance and have found that the bunch length sz = 0.5 cm could be obtained in steady state operation mode for the designed bunch current of 10 mA and RF-voltage of 250 kV.