Statistical and Low Temperature Physics - University of Liverpool

More documents

Recommendations

Info

7.4 Calorimetry Statistical Physics 43 Oct - Dec 2009
How to measure heat capacity: Calorimetry 1. Refrigerate the material of mass m to the starting temperature of Ti. 2. Isolate it thermally from its environment (e.g. by opening a heat switch). 3. Supply some heat P to reach the final temperature T f. 4. The result is C m = at the intermediate temperature P T f − Ti T = Tf + Ti . 2 Statistical Physics 44 Oct - Dec 2009
Page 1 and 2: Statistical and Low Temperature Phy
Page 3 and 4: Aim To understand the basic techniq
Page 5 and 6: Uses of low temperatures The branch
Page 7 and 8: Pobell (2007) The history of low te
Page 9 and 10: Refrigeration techniques Three refr
Page 11 and 12: 7.2 Liquids at low temperatures Sta
Page 13 and 14: To liquefy Air Air is first compres
Page 15 and 16: The Joule-Thomson (or Joule-Kelvin)
Page 17 and 18: A note about liquid hydrogen At roo
Page 19 and 20: http://en.wikipedia.org/wiki/Helium
Page 21 and 22: Helium-3 Helium-3 is only a fractio
Page 23 and 24: Kapitza’s helium liquefier http:/
Page 25 and 26: Liquid helium specific and latent h
Page 27 and 28: 7.3 Solids at low temperatures Stat
Page 29 and 30: Insulators For non-magnetic, crysta
Page 31 and 32: Insulators For T much smaller than
Page 33 and 34: Insulators This is a log-log plot o
Page 35 and 36: Metal Th Pauli principle means that
Page 37 and 38: Superconducting metals Many metals
Page 39 and 40: Magnetic specific heats Recall that
Page 41 and 42: Magnetic specific heats This figure
Page 43: Magnetic specific heats In the pres
Page 47 and 48: A low temperature calorimeter At lo
Page 49 and 50: Superconducting Heat switch The the
Page 51 and 52: Superconducting heat switch In orde
Page 53 and 54: What do we use for storing liquid g
Page 55 and 56: Storing liquid helium is more trick
Page 57 and 58: Pobell (2007) The helium-4 cryostat
Page 59 and 60: The helium-3 evaporation refrigerat
Page 61 and 62: Exercise 1 Show that at room temper
Page 63 and 64: We can calculate the proportion of
Page 65 and 66: Exercise 2 At room temperature, nor
Page 67 and 68: For normal hydrogen at 20 K, 75% wo
Page 69 and 70: Exercise 3 Calculate the Debye temp
Page 71 and 72: Exercise 4 At which temperature do
Page 73 and 74: We can find γ and A from the graph
Page 75 and 76: On the higher temperature side of p

Statistical and Low Temperature Physics - University of Liverpool

Create successful ePaper yourself

Delete template?

Save as template?