Paper presented at the EGS General Assembly, 21-25, April, 1997, Vienna, Austria
The CELIAS instrument onboard the SOHO satellite is designed to study the ionic and elemental composition of the solar wind and of solar energetic particles. The CELIAS instrument consists of three time-of-flight mass spectrometers. We will present measurements of the elemental abundance of oxygen and silicon solar wind ions. These measurements are performed with the MTOF sensor (Mass Time-of-Flight) with high mass and time resolution. The obtained elemental abundance will be compared with results from previous missions. The new findings arising from the unique time resolution of MTOF will be discussed in detail.