Calibration of Troitsk nu-mass detector readout electronics by signal digital filters

We present the results of tuning and calibration of the detector electronics in the signal digitization mode. The goal of the experiment is to search for a possible sterile neutrino signature in tritium beta-decay. The read-out electronics work in direct oscilloscope mode, which requires to optimize time frame the with the goal to minimize noise and energy resolution. We use a 7-pixel silicon drift detector (SDD) and a CMOS charge sensitive preamplifier with very low integration capacitor. Amplifier forms a slowly rising output shape and operates in pulse-reset mode. The 125 MHz ADC digitizes the signals. Using calibration data from Fe55 and Am241 gamma sources we check triangular and trapezoid digital filters to obtain the best noise and energy resolution performance. We are also examining the option to differentiate the output signal.Comment: 9 pages, 8 figure

LAPAROSCOPIC SURGERY IN TREATMENT OF ENDOMETRIAL CANCER (RESULTS OF 7-YEAR CLINICAL EXPERIENCE AT THE N.N. PETROV NATIONAL MEDICAL RESEARCH ONCOLOGY CENTER)

Introduction. The main method of treatment of endometrial cancer, the most common oncological disease, is surgery. Introduction of high-tech operations into gynecological practice promoted active use of laparoscopy in treatment of malignant tumors of the endometrium.Objective. To evaluate effectiveness of video endoscopic surgery in treatment of endometrial cancer.Materials and methods. In the period from 2010 to 2016, 1127 patients with endometrial cancer underwent surgery using video endoscopic complex with high resolution cameras at the N.N. Petrov National Medical Research Oncology Center, Ministry of Health of Russia.Results.  Using video endoscopic technology, excision of the uterus with appendages was performed in 588 (52.3 %) patients, excision of the uterus with appendages and pelvic lymph node dissection was performed in 523 (46.4 %) patients including 16 (1.4 %) patients with serous and papillary serous forms of endometrial cancer who also underwent omentectomy. No intraoperative complications were observed. In the majority of patients, postoperative period was characterized by early activization, satisfactory intestinal peristalsis on day 1, minimal complications, absence of contraindications for adjuvant beam therapy.Conclusion. Video endoscopic technology is a modern method of surgical treatment allowing to perform the full scope of planned radical surgical intervention in patients with endometrial cancer irrespectively of age and concomitant disorders with minimal traumatization, risk of intraand postoperative complications as well as favorable and fast rehabilitation period