Hi This is probably a better way to look at the various aspects of a quartz crystal:
http://www.mt-berlin.com/frames_ao/descriptions/sio2.htm <http://www.mt-berlin.com/frames_ao/descriptions/sio2.htm> First thing to look at is the number of directions you get a different speed of sound. Each of those forms an “axis” you might want to rotate around. Bob > On Feb 17, 2021, at 6:31 PM, Hal Murray <[email protected]> wrote: > > > [email protected] said: >> …… and there are whole families of crystal cuts that have been optimized for >> use as thermometers. There is no need to compromise on something like an AT >> or SC if you are after temperature. There are lots of different cuts to pick >> between. > > How many degrees of freedom are there if I want to make a crystal? What > fraction of the space has been explored? > > Rotation in 3D has 3 degrees of freedom, but we are making a plane so I think > we get one back. > > How accurately does a the crystal have to be oriented? If I'm doing a brute > force search, how close together would I have to make test samples in order > to > not jump over something interesting? > > > If I pick a type of cut, say AT, does the shape (round, rectangular) effect > the temperature profile? If it's rectangular, that may add another degree of > freedom. > > > -- > These are my opinions. I hate spam. > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
