====== Sample Environment ======

Sample environmemt on PANDA is available and supported mainly from MLZ SE pool. Please find the values of sample space and height you need in the drawings provided by pdf-files. 

===== Helium vapor pressure =====

For NV management, use phase diagram, e.g.:

http://groups.physics.umn.edu/zudovlab/manuals/cryogenics/Helium_Vapor_Pressure.png


===== Cryostats =====

==== CC Cryostat (liquid-free) ==== 

liquid-free closed cycle (CC) cryostat is the working-horse on PANDA for experiments above 2.5K and below 320K. To reduce background, a vacuum chamber with large diameter is available. To mount the sample, we need to open the whole cryostat, which means that sample exchange need additional 0.5 - 1 hour for drying the cryostat (depending on the inner temperature before exchange). This cryostat is dedicated to PANDA so it is available all the time and easy to use.

  * {{:panda:se:cc_cold_head.pdf|[drawing] CC cryostat}}
  * {{:panda:se:cc_cold_head_in_large_vacuum_chamber.pdf|[drawing] CC cryostat in vacuum chamber}}

==== CCR cryostat ====

For reaching the lower (or higher) temperatures than CC cryostat can do, we use CCR top loading cryostats. They can be also booked without a special insert, if user needs quick sample exchange during the experiment. They cannot reach 2.5K as CC cryostat, their minimum temperatures are normally around 3K. 

  * {{:panda:se:image_manager_content_noresize_cut-through-standard-ccr.png?linkonly|[drawing] schamatic view of the CCR cryostat}}

Following special inserts are available for CCR cryostat from the pool. They need to be booked in advance.

=== He3 Insert (for CCR) ===

He3 insert can reach temperatures from 300K down to 0.35K. Cooling time to base temperature is 3-4hours. Currently running He3 insert is very automatized and is used on PANDA very often.

  * {{:panda:se:frm2-inserts-drawing_febr_2015.pdf|[drawing] dimensions of available He3 and dilution inserts}} - On PANDA is normally used **3He-2 Ex-Halle** insert

=== Dilution Insert (for CCR) ===

He3 insert can reach temperatures from 1K down to 80mK. Without running the dilution, it is possible to reach temperatures above 3K. But reaching stable temperatures between 1-3K is not possible. Cooling time to base temperature is roughly 6 hours. Running dilution insert requires serious effort of the sample environment team.

  * {{:panda:se:frm2-inserts-drawing_febr_2015.pdf|[drawing] dimensions of available He3 and dilution inserts}} - On PANDA is normally used **Mischer 2** insert

==== He-cooled Variox (possible in combination with Kelvinox-diution insert) ====
Description will be added.
  * {{:panda:se:jvc-variox.pdf|[drawing] Variox cryostat}}
  * {{:panda:se:kelvinox_im_variox.pdf|[drawing] Kelvinox insert in Variox cryostat}}

===== Magnets =====
Several magnets are available, operated by MLZ sample environment groups. Please find the details below. 
==== 5.5T magnet MAG-V-7.5T ====

disturbs NEPOMUC operation, can be used only in exceptional cases
room temp. bore for liquid-free CCr Cryostat, possible in combination with 3He/diution inserts

  * Maximum field is only 5.5T, non-shielded
  * [[http://www.mlz-garching.de/instrumente-und-labore/probenumgebung/magnetische-felder.html|description of the magnets at MLZ webpage]]

==== 5T magnet JVM1-5.0T ====

cannot be provided now.
liquid-He cooled, base temp. 1.5K

  * {{:panda:se:sca0195_customer_approval_14mar17.pdf|[drawing] JVM-5T magnet}}
  * [[http://www.mlz-garching.de/instrumente-und-labore/probenumgebung/magnetische-felder.html|description of the magnets at MLZ webpage]]

==== 12T magnet symmetric ====

liquid-He cooled, recondensing, base temp. 1.5K, possible in combination with Kelvinox-diution insert

 
  * {{ :panda:12t_zeichnung_.pdf |}}

==== 8T magnet asymmetric ====
  
liquid-He cooled, recondensing, base temp. 1.5K, possible in combination with Kelvinox-diution insert

{{ :panda:8t_zeichnung_.pdf |}}