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--- accelerator:energy_frontier:start [2020/04/01 14:10] – [AF3: Multi-TeV Coliders] shiltsev
+++ accelerator:energy_frontier:start [2020/09/09 10:27] (current) – [Description] markapalmer
@@ Line 1: / Line 1: @@
-====== AF3: Multi-TeV Coliders ======
+====== AF4: Multi-TeV Colliders ======
 Co-Conveners:
-Alexander Valishev (Fermilab)
+Alexander Valishev (Fermilab),
-Mark Palmer (BNL)
+Mark Palmer (BNL),
-Nadia Pastrone (INFN/Torino)
+Nadia Pastrone (INFN/Torino) ,
+Jingyu Tang (IHEP)
 ===== Description=====
-fill in your topical group description (brief) here.
+For the past 50 years Particle Colliders have been at the forefront of scientific discoveries in high energy physics. This working group will focus on potential machine routes, R&D requirements, and possible timelines to deliver colliders that could operate in the 1-100 TeV center-of-mass energy range (or beyond).  The topics that we will address include:
+  * Connections between the physics needs and accelerator types
+  * Detailed machine requirements to achieve the community's physics goals
+  * Exploration of the various types of colliders that may play a future role at the energy frontier:
+        * Very high energy proton-proton machines
+        * Multi-TeV electron-positron machines
+        * Muon colliders
+        * Other very high energy machine concepts (e.g. gamma-gamma, high energy electron-ion, and others)
+  * Common issues at the very high energy scale such as energy efficiency and cost
+The first two topics above, will be explored in conjunction with the relevant Snowmass 2021 physics working groups.  For each of the machine concepts, we are soliciting a set of Letters of Intent from the accelerator community that individually address:
+  - The machine concept
+  - The R&D needs to deliver a potential future capability
+  - The connections of the technology to existing facilities (e.g. to provide potential facility construction and/or R&D pathways)
+A more detailed request for these LOIs will be circulated shortly after the APS April Meeting 2020.  A schedule for both joint meetings and AF4 discussions will also be developed at that point.
+Many relevant publications can be found at:  [[https://www.nature.com/collections/cajfiddcee]] , [[https://www.nature.com/collections/heigibehfc]], [[https://arxiv.org/abs/1910.11775]]
+===== Submitted LOI =====
+Here is the list of submitted LOIs to this  topic.
+ First index before "/"  corresponds to the primary frontier used for the submission.
+ {{url>https://www.snowmass21.org/docs/files/list.php?frontier=AF4  noborder 95%,600px}}