Dear cp2k users, I want to study the amorphous structure of a glass system (100-x-y)B2O3-xAg2O-yAl2O3 by using the SGCPMD. There are several questions confused me that I am begging for your suggestion. 1. After generating the initial velocity and equilibrate at 1800k，which method is appropriate to slowly quenching from 1800k to 500k by using SGCPMD？ Currently I have tried to slowly cool down by running SGCPMD with different NOISY_GAMMA_REGION for Ag and B, O at different temperature, such as 1800k,1300k,800k,500k. But I found this way has too much NOISY_GAMMA_REGION values to be tuned, and actually I could not get a very suitable parameter by doing such laborious job. I found that TMPERATURE_ANNEALING could be used for Langevin ensemble to quench, but during the quenching process by using TMPERATURE_ANNEALING, the NOISY_GAMMA_REGION values of different regions do not seem to be adjusted automatically. If it is possible to use the TMPERATURE_ANNEALING parameter for the SGCPMD quenching process, how should the NOISY_GAMMA_REGION parameter be handled in this case? 2. As for the (100-x-y)B2O3-xAg2O-yAl2O3 glass system, there are heavy atoms like Ag and other light atoms, and they have different NOISY_GAMMA_REGION values. Is there any potential quantified relationship between the NOISY_GAMMA_REGION values of different elements and their atomic number, atomic mass or atomic radius? Do you have any tricks on how to separately define these NOISY_GAMMA_REGION values precisely? Many thanks in advance! Weilin Chen -- You received this message because you are subscribed to the Google Groups "cp2k" group. To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp2k+unsubscribe@googlegroups.com">cp2k+unsubscribe@googlegroups.com</a>. To view this discussion on the web visit <a href="https://groups.google.com/d/msgid/cp2k/b4f4a112-2bed-4d1f-adfc-0a5d395e3549n%40googlegroups.com?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/cp2k/b4f4a112-2bed-4d1f-adfc-0a5d395e3549n%40googlegroups.com</a>.