If you have an Argonne account, simply visit https://cels-anl.slack.com/signup and sign up using SSO. You’ll automatically be added.
If you don’t have an Argonne account, you’ll need to be added as a guest. Send a message to your Argonne collaborator or host and request an invitation. If you’re confused, just send us an email to [email protected] and let us know who you’re working with and we’ll get you added.
If you’re already on slack and want to invite someone, you can do that by typing /invite_people <email-address> and you’ll have the opportunity to invite them to any channels you’re a part of.
You can use Slack in the browser, or you can download the app for Windows, Mac, iOS, or Android. See https://slack.com/downloads for details. If your have “Self Service” installed on your Mac, you can get the app from that.