Abstract. Variations of parameters of twice-ionized helium ions – He⁺⁺ ions or α-particles – in the solar wind plasma during the interplanetary shock front passage are investigated. We used the data measured by the BMSW (Bright Monitor of Solar Wind) instrument installed on the SPEKTR-R satellite, which operated since August 2011 to 2019 and registered 57 interplanetary shocks. According to received data, the parameters of He⁺⁺ ions were calculated: velocity Vα, temperature Tα, absolute density Nα and relative density (helium abundance) Nα/Np. The correlation of changes in helium abundance Nα/Np with the parameters β_i, θ_Bn and M_MS were investigated.

中文翻译：

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行星际激波中He ++离子的动力学

摘要。研究了行星际激波前通道期间太阳风等离子体中两次电离的氦离子（He ⁺⁺离子或α粒子）的参数变化。我们使用了安装在SPEKTR-R卫星上的BMSW（太阳风的明亮监测器）仪器测得的数据，该仪器自2011年8月至2019年运行，记录了57次行星际冲击。根据收到的数据，计算出He ⁺⁺离子的参数：速度Vα，温度Tα，绝对密度Nα和相对密度（氦丰度）Nα/ Np。研究了氦丰度Nα/ Np变化与参数_βi，_θBn和M _MS的相关性。