Located in 3100F corridor of MRB 3
Currently, we have two large towers available for renting cryostorage space.
Use of the cryostorage tank is subject to availability. The tank is set up to have a maximum volume of 6 inches from the bottom of the tank and a minimum volume of 3 inches from the bottom of the tank. The temperature reading on the console is measured at 23 inches above the bottom of the tank. Liquid nitrogen is −196 °C and tank temp usually measures around −175 °C, so tank temperature is a gradient of temperatures between these two points depending on the height of the stored sample. The bottom box of a tower will be submerged in liquid nitrogen at all times, while the second slot from the bottom will experience the rise and fall of the liquid level. All other tower slots are vapor stored.
Because spills into the liquid nitrogen are nearly inevitable, I recommend preparing all samples for liquid immersion. PLEASE, NEVER USE CARDBOARD STORAGE BOXES! They tend to become brittle and break with repeated freeze thaw cycles. At that point, it becomes a fishing expedition with the two fishing nets available. Metal or plastic storage boxes are less likely to break and spill samples into the bottom of the tank. Also, please advise the Equipment Manager if you do not have a STRAIGHT metal rod for your tower that extends from the top to the bottom of the tower. These prevent boxes from falling out into the tank and the subsequent fishing expeditions.
Large towers hold up to 1,300 samples (13 slots, 10x10 boxes) and small towers hold up to 325 samples (13 slots, 5x5 boxes). I advocate the use of plastic, or metal sided boxes because cardboard boxes inevitably shatter.
If you find that you will be needing additional space in the future, please advise the Equipment Manager to see if you can be accommodated somehow.