Solid hydrogen target for missing mass spectroscopy in inverse kinematics

We have developed a solid hydrogen target system called ``Solid Hydrogen Target for Recoil detection In Coincidence with Inverse Kinematics'' (SH TRIC K). Many experiments require thin and large SHTs (e.g. 1 mm in thickness and 30 mm in diameter) to perform missing mass spectroscopy with radioactive ion beams. However, it has been difficult to make such a SHT due to thermal radiation from environment and non-uniformity of the target thickness. In order to overcome the problem, we made a ortho-para converter and a simple mechanical press. The former is used to increase a ratio of para H$_{2}$ in H$_{2}$ gas. Note that the thermal conductivity of pure para H$_{2}$ is more than 100 times larger than that of normal H$_{2}$. The latter is used to make the surface of the SHT uniform. Finally, we succeeded in making homogeneous pure H$_{2}$ targets thanks to the improvement. By using the SHTs, we have performed experiments of elastic scattering of protons with RI beams (ESPRI) at HIMAC, GSI, and RIBF. In my presentation, I will show the development and the experimental results. Furthermore, I will also talk about recent newly development for some experiments using the cryogenic system at RCNP.