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The frequency stability of a passive rubidium atomic frequency standard (RAFS) largely depends on the performance of the microwave cavity used in the physics package. In this paper, a large-size slotted tube microwave cavity with an inner diameter of 40 mm, as well as the physics package based on this cavity, were designed and built. Theoretical calculations and experimental results showed that the magnetic lines inside this cavity were highly parallel to the quantization axis. The frequency discrimination slope and the shot noise of the physics package were measured. The results showed that the cavity could be used to realize an RAFS with frequency stability of .

Objective: To evaluate the safety, efficacy and patient acceptability of burn therapy with Chinese Medicinals in treating pain induced by lumbar intervertebral disc herniation (LDH) in community. Methods: All 684 cases of LDH were provided with Chinese Medicinal burn therapy treatment in this research. The visual analogue scoring (VAS) was applied to evaluate the lumbago and the quality of life of patients before and after treatment. Moreover, logistic regression analysis was applied to analyze the influence factors of curative effect. Results: The total effective rate of analgesia was 77.2%. The total effective rate of patients with severe pain and disease course ≤6 months before the treatment was 91.8 and 90.9%, which was significantly higher than that of patients with mild and moderate pain group (70.7%) with the course of disease >6 months (76.1%). The more severe the lower back pain, the better the curative effect (OR = 4.877), and the shorter the disease course of lumbago, the better (OR = 0.256) the curative effect. The overall effective rate of improvement was 79.7, 80.2 and 80.3%, respectively on the effects of daily life, daily work and walking ability. The incidence of adverse reactions was 3.5%. The patients' satisfaction and approval degree of technical treatment were 84.0 and 86.3%. Conclusions: The treatment with Chinese Medicinal burn therapy to relieve pain induced by LDH was safe and effective. Moreover, patient's compliance was better; the degree of acceptance was high. In addition, the technique is easy to master by doctors in a basic hospital setting, and is suitable for promotion in primary health care institutions. [ABSTRACT FROM AUTHOR]